16156656099 has 24 divisors (see below), whose sum is σ = 24571207440. Its totient is φ = 10201906368.

The previous prime is 16156656091. The next prime is 16156656119. The reversal of 16156656099 is 99065665161.

16156656099 is a `hidden beast` number, since 1 + 6 + 15 + 66 + 560 + 9 + 9 = 666.

It is not a de Polignac number, because 16156656099 - 2³ = 16156656091 is a prime.

It is a super-2 number, since 2×16156656099² (a number of 21 digits) contains 22 as substring.

It is a zygodrome in base 2.

It is not an unprimeable number, because it can be changed into a prime (16156656091) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1072729 + ... + 1087685.

It is an arithmetic number, because the mean of its divisors is an integer number (1023800310).

Almost surely, 2^16156656099 is an apocalyptic number.

16156656099 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

16156656099 is a deficient number, since it is larger than the sum of its proper divisors (8414551341).

16156656099 is a wasteful number, since it uses less digits than its factorization.

16156656099 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21299 (or 21296 counting only the distinct ones).

The product of its (nonzero) digits is 2624400, while the sum is 54.

The spelling of 16156656099 in words is "sixteen billion, one hundred fifty-six million, six hundred fifty-six thousand, ninety-nine".