15657484642 has 8 divisors (see below), whose sum is σ = 23714248896. Its totient is φ = 7752735012.

The previous prime is 15657484621. The next prime is 15657484673. The reversal of 15657484642 is 24648475651.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 15657484642.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 38003398 + ... + 38003809.

It is an arithmetic number, because the mean of its divisors is an integer number (2964281112).

Almost surely, 2^15657484642 is an apocalyptic number.

15657484642 is a deficient number, since it is larger than the sum of its proper divisors (8056764254).

15657484642 is a wasteful number, since it uses less digits than its factorization.

15657484642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76007312.

The product of its digits is 6451200, while the sum is 52.

The spelling of 15657484642 in words is "fifteen billion, six hundred fifty-seven million, four hundred eighty-four thousand, six hundred forty-two".