1616002020 has 144 divisors (see below), whose sum is σ = 5004260352. Its totient is φ = 422035200.

The previous prime is 1616002001. The next prime is 1616002021. The reversal of 1616002020 is 202006161.

It is a happy number.

1616002020 is a `hidden beast` number, since 1 + 61 + 600 + 2 + 0 + 2 + 0 = 666.

It is a super-2 number, since 2×1616002020² = 5222925057288160800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 1616001984 and 1616002002.

It is not an unprimeable number, because it can be changed into a prime (1616002021) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1872109 + ... + 1872971.

It is an arithmetic number, because the mean of its divisors is an integer number (34751808).

Almost surely, 2^1616002020 is an apocalyptic number.

1616002020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1616002020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2502130176).

1616002020 is an abundant number, since it is smaller than the sum of its proper divisors (3388258332).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1616002020 is a wasteful number, since it uses less digits than its factorization.

1616002020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1082 (or 1077 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 1616002020 is about 40199.5276091648. The cubic root of 1616002020 is about 1173.4933506437.

Adding to 1616002020 its reverse (202006161), we get a palindrome (1818008181).

The spelling of 1616002020 in words is "one billion, six hundred sixteen million, two thousand, twenty".