16156501551 has 6 divisors (see below), whose sum is σ = 23337168920. Its totient is φ = 10771001028.

The previous prime is 16156501519. The next prime is 16156501567. The reversal of 16156501551 is 15510565161.

It is a happy number.

16156501551 is a `hidden beast` number, since 1 + 6 + 1 + 56 + 50 + 1 + 551 = 666.

It is not a de Polignac number, because 16156501551 - 2⁵ = 16156501519 is a prime.

It is a super-2 number, since 2×16156501551² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16156501651) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 897583411 + ... + 897583428.

Almost surely, 2^16156501551 is an apocalyptic number.

16156501551 is a deficient number, since it is larger than the sum of its proper divisors (7180667369).

16156501551 is a wasteful number, since it uses less digits than its factorization.

16156501551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1795166845 (or 1795166842 counting only the distinct ones).

The product of its (nonzero) digits is 22500, while the sum is 36.

The spelling of 16156501551 in words is "sixteen billion, one hundred fifty-six million, five hundred one thousand, five hundred fifty-one".