75391507665057 has 4 divisors (see below), whose sum is σ = 100522010220080. Its totient is φ = 50261005110036.

The previous prime is 75391507665031. The next prime is 75391507665059. The reversal of 75391507665057 is 75056670519357.

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 75391507665057 - 2⁷ = 75391507664929 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75391507665059) 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, 12565251277507 + ... + 12565251277512.

It is an arithmetic number, because the mean of its divisors is an integer number (25130502555020).

Almost surely, 2^{75391507665057} is an apocalyptic number.

It is an amenable number.

75391507665057 is a deficient number, since it is larger than the sum of its proper divisors (25130502555023).

75391507665057 is a wasteful number, since it uses less digits than its factorization.

75391507665057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25130502555022.

The product of its (nonzero) digits is 208372500, while the sum is 66.

The spelling of 75391507665057 in words is "seventy-five trillion, three hundred ninety-one billion, five hundred seven million, six hundred sixty-five thousand, fifty-seven".