75897479857 has 4 divisors (see below), whose sum is σ = 79892084080. Its totient is φ = 71902875636.

The previous prime is 75897479851. The next prime is 75897479921.

75897479857 is nontrivially palindromic in base 10.

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 a cyclic number.

It is not a de Polignac number, because 75897479857 - 2³¹ = 73749996209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75897479851) 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, 1997302083 + ... + 1997302120.

It is an arithmetic number, because the mean of its divisors is an integer number (19973021020).

Almost surely, 2^75897479857 is an apocalyptic number.

It is an amenable number.

75897479857 is a deficient number, since it is larger than the sum of its proper divisors (3994604223).

75897479857 is a wasteful number, since it uses less digits than its factorization.

75897479857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3994604222.

The product of its digits is 1244678400, while the sum is 76.

The spelling of 75897479857 in words is "seventy-five billion, eight hundred ninety-seven million, four hundred seventy-nine thousand, eight hundred fifty-seven".