15125631648 has 24 divisors (see below), whose sum is σ = 39704783328. Its totient is φ = 5041877184.

The previous prime is 15125631643. The next prime is 15125631673. The reversal of 15125631648 is 84613652151.

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

It is not an unprimeable number, because it can be changed into a prime (15125631641) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78779236 + ... + 78779427.

It is an arithmetic number, because the mean of its divisors is an integer number (1654365972).

Almost surely, 2^15125631648 is an apocalyptic number.

It is an amenable number.

15125631648 is an abundant number, since it is smaller than the sum of its proper divisors (24579151680).

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

15125631648 is a wasteful number, since it uses less digits than its factorization.

15125631648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157558676 (or 157558668 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The spelling of 15125631648 in words is "fifteen billion, one hundred twenty-five million, six hundred thirty-one thousand, six hundred forty-eight".