15500646468 has 36 divisors (see below), whose sum is σ = 40137856668. Its totient is φ = 5040860160.

The previous prime is 15500646437. The next prime is 15500646521. The reversal of 15500646468 is 86464600551.

It can be written as a sum of positive squares in 2 ways, for example, as 5404014144 + 10096632324 = 73512^2 + 100482^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 5249421 + ... + 5252372.

It is an arithmetic number, because the mean of its divisors is an integer number (1114940463).

Almost surely, 2^15500646468 is an apocalyptic number.

15500646468 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

15500646468 is an abundant number, since it is smaller than the sum of its proper divisors (24637210200).

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

15500646468 is a wasteful number, since it uses less digits than its factorization.

15500646468 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10501844 (or 10501839 counting only the distinct ones).

The product of its (nonzero) digits is 691200, while the sum is 45.

The spelling of 15500646468 in words is "fifteen billion, five hundred million, six hundred forty-six thousand, four hundred sixty-eight".