75487816507 has 4 divisors (see below), whose sum is σ = 75745454400. Its totient is φ = 75230178616.

The previous prime is 75487816477. The next prime is 75487816511. The reversal of 75487816507 is 70561878457.

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 75487816507 - 2²⁷ = 75353598779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (75487816577) 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, 128818507 + ... + 128819092.

It is an arithmetic number, because the mean of its divisors is an integer number (18936363600).

Almost surely, 2^75487816507 is an apocalyptic number.

75487816507 is a deficient number, since it is larger than the sum of its proper divisors (257637893).

75487816507 is a wasteful number, since it uses less digits than its factorization.

75487816507 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 257637892.

The product of its (nonzero) digits is 13171200, while the sum is 58.

The spelling of 75487816507 in words is "seventy-five billion, four hundred eighty-seven million, eight hundred sixteen thousand, five hundred seven".