4518638972 has 24 divisors (see below), whose sum is σ = 8364473376. Its totient is φ = 2131481088.

The previous prime is 4518638923. The next prime is 4518638977. The reversal of 4518638972 is 2798368154.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4518638977) 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, 329693 + ... + 343124.

It is an arithmetic number, because the mean of its divisors is an integer number (348519724).

Almost surely, 2^4518638972 is an apocalyptic number.

It is an amenable number.

4518638972 is a deficient number, since it is larger than the sum of its proper divisors (3845834404).

4518638972 is a wasteful number, since it uses less digits than its factorization.

4518638972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 672917 (or 672915 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 53.

The square root of 4518638972 is about 67220.8224585210. The cubic root of 4518638972 is about 1653.2399115650.

The spelling of 4518638972 in words is "four billion, five hundred eighteen million, six hundred thirty-eight thousand, nine hundred seventy-two".