75521566312051 has 4 divisors (see below), whose sum is σ = 75522996507952. Its totient is φ = 75520136116152.

The previous prime is 75521566311979. The next prime is 75521566312057. The reversal of 75521566312051 is 15021366512557.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 75521566312051 - 2¹⁷ = 75521566180979 is a prime.

It is a super-2 number, since 2×75521566312051² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 75521566311986 and 75521566312004.

It is not an unprimeable number, because it can be changed into a prime (75521566312057) 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, 715018740 + ... + 715124353.

It is an arithmetic number, because the mean of its divisors is an integer number (18880749126988).

Almost surely, 2^{75521566312051} is an apocalyptic number.

75521566312051 is a deficient number, since it is larger than the sum of its proper divisors (1430195901).

75521566312051 is a wasteful number, since it uses less digits than its factorization.

75521566312051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1430195900.

The product of its (nonzero) digits is 1890000, while the sum is 49.

The spelling of 75521566312051 in words is "seventy-five trillion, five hundred twenty-one billion, five hundred sixty-six million, three hundred twelve thousand, fifty-one".