74388643612 has 24 divisors (see below), whose sum is σ = 132568974720. Its totient is φ = 36513531120.

The previous prime is 74388643603. The next prime is 74388643627. The reversal of 74388643612 is 21634688347.

It is a self number, because there is not a number n which added to its sum of digits gives 74388643612.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 45214 + ... + 388357.

It is an arithmetic number, because the mean of its divisors is an integer number (5523707280).

Almost surely, 2^74388643612 is an apocalyptic number.

It is an amenable number.

74388643612 is a deficient number, since it is larger than the sum of its proper divisors (58180331108).

74388643612 is a wasteful number, since it uses less digits than its factorization.

74388643612 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 434361 (or 434359 counting only the distinct ones).

The product of its digits is 4644864, while the sum is 52.

The spelling of 74388643612 in words is "seventy-four billion, three hundred eighty-eight million, six hundred forty-three thousand, six hundred twelve".