75147221065 has 32 divisors (see below), whose sum is σ = 106686927360. Its totient is φ = 49718054400.

The previous prime is 75147221059. The next prime is 75147221089. The reversal of 75147221065 is 56012274157.

It is not a de Polignac number, because 75147221065 - 2⁹ = 75147220553 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1478220 + ... + 1528210.

It is an arithmetic number, because the mean of its divisors is an integer number (3333966480).

Almost surely, 2^75147221065 is an apocalyptic number.

It is an amenable number.

75147221065 is a deficient number, since it is larger than the sum of its proper divisors (31539706295).

75147221065 is a wasteful number, since it uses less digits than its factorization.

75147221065 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51513.

The product of its (nonzero) digits is 117600, while the sum is 40.

The spelling of 75147221065 in words is "seventy-five billion, one hundred forty-seven million, two hundred twenty-one thousand, sixty-five".