1615480020 has 216 divisors, whose sum is σ = 6218922528. Its totient is φ = 335664000.

The previous prime is 1615479973. The next prime is 1615480021. The reversal of 1615480020 is 200845161.

1615480020 is a `hidden beast` number, since 1 + 615 + 48 + 0 + 0 + 2 + 0 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1615480021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 88695 + ... + 105345.

It is an arithmetic number, because the mean of its divisors is an integer number (28791308).

Almost surely, 2^1615480020 is an apocalyptic number.

1615480020 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 1615480020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3109461264).

1615480020 is an abundant number, since it is smaller than the sum of its proper divisors (4603442508).

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

1615480020 is a wasteful number, since it uses less digits than its factorization.

1615480020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16691 (or 16679 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 1615480020 is about 40193.0344711618. The cubic root of 1615480020 is about 1173.3669833310.

The spelling of 1615480020 in words is "one billion, six hundred fifteen million, four hundred eighty thousand, twenty".