75405225987 has 48 divisors (see below), whose sum is σ = 136789598400. Its totient is φ = 39774163968.

The previous prime is 75405225971. The next prime is 75405226007. The reversal of 75405225987 is 78952250457.

75405225987 is a `hidden beast` number, since 7 + 5 + 40 + 5 + 2 + 2 + 598 + 7 = 666.

It is not a de Polignac number, because 75405225987 - 2⁴ = 75405225971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (75405225947) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 899358 + ... + 979619.

It is an arithmetic number, because the mean of its divisors is an integer number (2849783300).

Almost surely, 2^75405225987 is an apocalyptic number.

75405225987 is a deficient number, since it is larger than the sum of its proper divisors (61384372413).

75405225987 is a wasteful number, since it uses less digits than its factorization.

75405225987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879017 (or 1879000 counting only the distinct ones).

The product of its (nonzero) digits is 7056000, while the sum is 54.

The spelling of 75405225987 in words is "seventy-five billion, four hundred five million, two hundred twenty-five thousand, nine hundred eighty-seven".