75240121918 has 12 divisors (see below), whose sum is σ = 122209547688. Its totient is φ = 34726209960.

The previous prime is 75240121849. The next prime is 75240121939. The reversal of 75240121918 is 81912104257.

It is a super-2 number, since 2×75240121918² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 111301618 + ... + 111302293.

It is an arithmetic number, because the mean of its divisors is an integer number (10184128974).

Almost surely, 2^75240121918 is an apocalyptic number.

75240121918 is a deficient number, since it is larger than the sum of its proper divisors (46969425770).

75240121918 is a wasteful number, since it uses less digits than its factorization.

75240121918 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 222603939 (or 222603926 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 40.

The spelling of 75240121918 in words is "seventy-five billion, two hundred forty million, one hundred twenty-one thousand, nine hundred eighteen".