1616161628 has 24 divisors (see below), whose sum is σ = 2917251792. Its totient is φ = 782849664.

The previous prime is 1616161621. The next prime is 1616161643. The reversal of 1616161628 is 8261616161.

It is a super-2 number, since 2×1616161628² = 5223956815639220768, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 1616161591 and 1616161600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1616161621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11051 + ... + 57917.

It is an arithmetic number, because the mean of its divisors is an integer number (121552158).

Almost surely, 2^1616161628 is an apocalyptic number.

It is an amenable number.

1616161628 is a deficient number, since it is larger than the sum of its proper divisors (1301090164).

1616161628 is a wasteful number, since it uses less digits than its factorization.

1616161628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47141 (or 47139 counting only the distinct ones).

The product of its digits is 20736, while the sum is 38.

The square root of 1616161628 is about 40201.5127576065. The cubic root of 1616161628 is about 1173.5319835906.

Adding to 1616161628 its reverse (8261616161), we get a palindrome (9877777789).

The spelling of 1616161628 in words is "one billion, six hundred sixteen million, one hundred sixty-one thousand, six hundred twenty-eight".