74920770636 has 24 divisors (see below), whose sum is σ = 175988391600. Its totient is φ = 24805981632.

The previous prime is 74920770611. The next prime is 74920770637. The reversal of 74920770636 is 63607702947.

It is a happy number.

It is a super-2 number, since 2×74920770636² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (74920770637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20949211 + ... + 20952786.

It is an arithmetic number, because the mean of its divisors is an integer number (7332849650).

Almost surely, 2^74920770636 is an apocalyptic number.

It is an amenable number.

74920770636 is an abundant number, since it is smaller than the sum of its proper divisors (101067620964).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

74920770636 is a wasteful number, since it uses less digits than its factorization.

74920770636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41902153 (or 41902151 counting only the distinct ones).

The product of its (nonzero) digits is 2667168, while the sum is 51.

The spelling of 74920770636 in words is "seventy-four billion, nine hundred twenty million, seven hundred seventy thousand, six hundred thirty-six".