16156621236 has 96 divisors (see below), whose sum is σ = 44116934400. Its totient is φ = 4600079232.

The previous prime is 16156621219. The next prime is 16156621277. The reversal of 16156621236 is 63212665161.

It is a super-2 number, since 2×16156621236² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 16156621194 and 16156621203.

It is a congruent number.

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, 1199290 + ... + 1212686.

It is an arithmetic number, because the mean of its divisors is an integer number (459551400).

Almost surely, 2^16156621236 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 16156621236, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22058467200).

16156621236 is an abundant number, since it is smaller than the sum of its proper divisors (27960313164).

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

16156621236 is a wasteful number, since it uses less digits than its factorization.

16156621236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13718 (or 13702 counting only the distinct ones).

The product of its digits is 77760, while the sum is 39.

The spelling of 16156621236 in words is "sixteen billion, one hundred fifty-six million, six hundred twenty-one thousand, two hundred thirty-six".