16155601992 has 24 divisors (see below), whose sum is σ = 43754755590. Its totient is φ = 5385200640.

The previous prime is 16155601951. The next prime is 16155601999. The reversal of 16155601992 is 29910655161.

It is a happy number.

16155601992 is a `hidden beast` number, since 1 + 6 + 1 + 556 + 0 + 1 + 9 + 92 = 666.

16155601992 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 12953626596 + 3201975396 = 113814^2 + 56586^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×16155601992² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16155601999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112191609 + ... + 112191752.

Almost surely, 2^16155601992 is an apocalyptic number.

16155601992 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16155601992 is an abundant number, since it is smaller than the sum of its proper divisors (27599153598).

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

16155601992 is a wasteful number, since it uses less digits than its factorization.

16155601992 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 224383373 (or 224383366 counting only the distinct ones).

The product of its (nonzero) digits is 145800, while the sum is 45.

The spelling of 16155601992 in words is "sixteen billion, one hundred fifty-five million, six hundred one thousand, nine hundred ninety-two".