15451517972 has 48 divisors (see below), whose sum is σ = 31808306880. Its totient is φ = 6491462400.

The previous prime is 15451517971. The next prime is 15451517993. The reversal of 15451517972 is 27971515451.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15451517971) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 191123 + ... + 259674.

It is an arithmetic number, because the mean of its divisors is an integer number (662673060).

Almost surely, 2^15451517972 is an apocalyptic number.

It is an amenable number.

15451517972 is an abundant number, since it is smaller than the sum of its proper divisors (16356788908).

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

15451517972 is a wasteful number, since it uses less digits than its factorization.

15451517972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450872 (or 450870 counting only the distinct ones).

The product of its digits is 441000, while the sum is 47.

The spelling of 15451517972 in words is "fifteen billion, four hundred fifty-one million, five hundred seventeen thousand, nine hundred seventy-two".