31542500642 has 8 divisors (see below), whose sum is σ = 47449321500. Its totient is φ = 15726060144.

The previous prime is 31542500641. The next prime is 31542500653. The reversal of 31542500642 is 24600524513.

It can be written as a sum of positive squares in 2 ways, for example, as 28767212881 + 2775287761 = 169609^2 + 52681^2 .

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

It is a junction number, because it is equal to n+sod(n) for n = 31542500599 and 31542500608.

It is not an unprimeable number, because it can be changed into a prime (31542500641) 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, 22594217 + ... + 22595612.

Almost surely, 2^31542500642 is an apocalyptic number.

31542500642 is a deficient number, since it is larger than the sum of its proper divisors (15906820858).

31542500642 is a wasteful number, since it uses less digits than its factorization.

31542500642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45190180.

The product of its (nonzero) digits is 28800, while the sum is 32.

The spelling of 31542500642 in words is "thirty-one billion, five hundred forty-two million, five hundred thousand, six hundred forty-two".