75722556621 has 4 divisors (see below), whose sum is σ = 100963408832. Its totient is φ = 50481704412.

The previous prime is 75722556619. The next prime is 75722556631. The reversal of 75722556621 is 12665522757.

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 75722556621 - 2¹ = 75722556619 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 (75722556601) 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, 12620426101 + ... + 12620426106.

It is an arithmetic number, because the mean of its divisors is an integer number (25240852208).

Almost surely, 2^75722556621 is an apocalyptic number.

It is an amenable number.

75722556621 is a deficient number, since it is larger than the sum of its proper divisors (25240852211).

75722556621 is a wasteful number, since it uses less digits than its factorization.

75722556621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25240852210.

The product of its digits is 1764000, while the sum is 48.

The spelling of 75722556621 in words is "seventy-five billion, seven hundred twenty-two million, five hundred fifty-six thousand, six hundred twenty-one".