16156621104 has 160 divisors (see below), whose sum is σ = 45426925824. Its totient is φ = 4918717440.

The previous prime is 16156621099. The next prime is 16156621127. The reversal of 16156621104 is 40112665161.

It is a super-2 number, since 2×16156621104² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 36470707 + ... + 36471149.

Almost surely, 2^16156621104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16156621104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22713462912).

16156621104 is an abundant number, since it is smaller than the sum of its proper divisors (29270304720).

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

16156621104 is a wasteful number, since it uses less digits than its factorization.

16156621104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 955 (or 949 counting only the distinct ones).

The product of its (nonzero) digits is 8640, while the sum is 33.

The spelling of 16156621104 in words is "sixteen billion, one hundred fifty-six million, six hundred twenty-one thousand, one hundred four".