15640572342 has 32 divisors (see below), whose sum is σ = 33178907520. Its totient is φ = 4901420160.

The previous prime is 15640572341. The next prime is 15640572347. The reversal of 15640572342 is 24327504651.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 15640572342.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15640572341) 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, 508723 + ... + 538590.

It is an arithmetic number, because the mean of its divisors is an integer number (1036840860).

Almost surely, 2^15640572342 is an apocalyptic number.

15640572342 is an abundant number, since it is smaller than the sum of its proper divisors (17538335178).

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

15640572342 is a wasteful number, since it uses less digits than its factorization.

15640572342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1047468.

The product of its (nonzero) digits is 201600, while the sum is 39.

The spelling of 15640572342 in words is "fifteen billion, six hundred forty million, five hundred seventy-two thousand, three hundred forty-two".