538190963721 has 6 divisors (see below), whose sum is σ = 777386947610. Its totient is φ = 358793975808.

The previous prime is 538190963669. The next prime is 538190963731. The reversal of 538190963721 is 127369091835.

538190963721 is a `hidden beast` number, since 538 + 19 + 0 + 96 + 3 + 7 + 2 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 506750354496 + 31440609225 = 711864^2 + 177315^2 .

It is not a de Polignac number, because 538190963721 - 2⁷ = 538190963593 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (538190963731) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 29899497976 + ... + 29899497993.

Almost surely, 2^538190963721 is an apocalyptic number.

It is an amenable number.

538190963721 is a deficient number, since it is larger than the sum of its proper divisors (239195983889).

538190963721 is a wasteful number, since it uses less digits than its factorization.

538190963721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59798995975 (or 59798995972 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 54.

The spelling of 538190963721 in words is "five hundred thirty-eight billion, one hundred ninety million, nine hundred sixty-three thousand, seven hundred twenty-one".