375564521613 has 4 divisors (see below), whose sum is σ = 500752695488. Its totient is φ = 250376347740.

The previous prime is 375564521609. The next prime is 375564521621. The reversal of 375564521613 is 316125465573.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 375564521613 - 2² = 375564521609 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (375564521113) 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, 62594086933 + ... + 62594086938.

It is an arithmetic number, because the mean of its divisors is an integer number (125188173872).

Almost surely, 2^375564521613 is an apocalyptic number.

It is an amenable number.

375564521613 is a deficient number, since it is larger than the sum of its proper divisors (125188173875).

375564521613 is a wasteful number, since it uses less digits than its factorization.

375564521613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125188173874.

The product of its digits is 2268000, while the sum is 48.

The spelling of 375564521613 in words is "three hundred seventy-five billion, five hundred sixty-four million, five hundred twenty-one thousand, six hundred thirteen".