38518867172 has 12 divisors (see below), whose sum is σ = 71373195180. Its totient is φ = 18126525696.

The previous prime is 38518867157. The next prime is 38518867183. The reversal of 38518867172 is 27176881583.

It can be written as a sum of positive squares in 2 ways, for example, as 15422162596 + 23096704576 = 124186^2 + 151976^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 283226897 + ... + 283227032.

It is an arithmetic number, because the mean of its divisors is an integer number (5947766265).

Almost surely, 2^38518867172 is an apocalyptic number.

It is an amenable number.

38518867172 is a deficient number, since it is larger than the sum of its proper divisors (32854328008).

38518867172 is a wasteful number, since it uses less digits than its factorization.

38518867172 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 566453950 (or 566453948 counting only the distinct ones).

The product of its digits is 4515840, while the sum is 56.

The spelling of 38518867172 in words is "thirty-eight billion, five hundred eighteen million, eight hundred sixty-seven thousand, one hundred seventy-two".