16161305616 has 30 divisors (see below), whose sum is σ = 45229209870. Its totient is φ = 5387101824.

The previous prime is 16161305599. The next prime is 16161305659. The reversal of 16161305616 is 61650316161.

16161305616 is a `hidden beast` number, since 1 + 6 + 1 + 6 + 1 + 30 + 5 + 616 = 666.

It can be written as a sum of positive squares in only one way, i.e., 11449856016 + 4711449600 = 107004^2 + 68640^2 .

It is a super-2 number, since 2×16161305616² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 56115501 + ... + 56115788.

It is an arithmetic number, because the mean of its divisors is an integer number (1507640329).

Almost surely, 2^16161305616 is an apocalyptic number.

16161305616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

16161305616 is an abundant number, since it is smaller than the sum of its proper divisors (29067904254).

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

16161305616 is a wasteful number, since it uses less digits than its factorization.

16161305616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112231303 (or 112231294 counting only the distinct ones).

The product of its (nonzero) digits is 19440, while the sum is 36.

The spelling of 16161305616 in words is "sixteen billion, one hundred sixty-one million, three hundred five thousand, six hundred sixteen".