15457670644 has 48 divisors (see below), whose sum is σ = 29619147600. Its totient is φ = 7015910400.

The previous prime is 15457670633. The next prime is 15457670689. The reversal of 15457670644 is 44607675451.

It can be written as a sum of positive squares in 8 ways, for example, as 821510244 + 14636160400 = 28662^2 + 120980^2 .

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 772672 + ... + 792424.

It is an arithmetic number, because the mean of its divisors is an integer number (617065575).

Almost surely, 2^15457670644 is an apocalyptic number.

It is an amenable number.

15457670644 is a deficient number, since it is larger than the sum of its proper divisors (14161476956).

15457670644 is a wasteful number, since it uses less digits than its factorization.

15457670644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20020 (or 20018 counting only the distinct ones).

The product of its (nonzero) digits is 2822400, while the sum is 49.

The spelling of 15457670644 in words is "fifteen billion, four hundred fifty-seven million, six hundred seventy thousand, six hundred forty-four".