16318725012 has 18 divisors (see below), whose sum is σ = 41250110538. Its totient is φ = 5439574992.

The previous prime is 16318724909. The next prime is 16318725023. The reversal of 16318725012 is 21052781361.

16318725012 is a `hidden beast` number, since 1 + 631 + 8 + 7 + 2 + 5 + 0 + 12 = 666.

It can be written as a sum of positive squares in only one way, i.e., 13624492176 + 2694232836 = 116724^2 + 51906^2 .

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 453297917 = 16318725012 / (1 + 6 + 3 + 1 + 8 + 7 + 2 + 5 + 0 + 1 + 2).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 226648923 + ... + 226648994.

Almost surely, 2^16318725012 is an apocalyptic number.

16318725012 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

16318725012 is an abundant number, since it is smaller than the sum of its proper divisors (24931385526).

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

16318725012 is a wasteful number, since it uses less digits than its factorization.

16318725012 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453297927 (or 453297922 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 36.

The spelling of 16318725012 in words is "sixteen billion, three hundred eighteen million, seven hundred twenty-five thousand, twelve".