75261216257 has 4 divisors (see below), whose sum is σ = 76006376916. Its totient is φ = 74516055600.

The previous prime is 75261216197. The next prime is 75261216263.

75261216257 is nontrivially palindromic in base 10.

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

It can be written as a sum of positive squares in 2 ways, for example, as 53568639601 + 21692576656 = 231449^2 + 147284^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-75261216257 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75261216287) 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, 372580178 + ... + 372580379.

It is an arithmetic number, because the mean of its divisors is an integer number (19001594229).

Almost surely, 2^75261216257 is an apocalyptic number.

It is an amenable number.

75261216257 is a deficient number, since it is larger than the sum of its proper divisors (745160659).

75261216257 is a wasteful number, since it uses less digits than its factorization.

75261216257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 745160658.

The product of its digits is 352800, while the sum is 44.

The spelling of 75261216257 in words is "seventy-five billion, two hundred sixty-one million, two hundred sixteen thousand, two hundred fifty-seven".