73138875364 has 9 divisors (see below), whose sum is σ = 127993978441. Its totient is φ = 36569167240.

The previous prime is 73138875349. The next prime is 73138875373. The reversal of 73138875364 is 46357883137.

It is a happy number.

The square root of 73138875364 is 270442.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 62921708964 + 10217166400 = 250842^2 + 101080^2 .

It is a super-2 number, since 2×73138875364² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 473274 + ... + 608494.

Almost surely, 2^73138875364 is an apocalyptic number.

73138875364 is the 270442-nd square number.

It is an amenable number.

73138875364 is a deficient number, since it is larger than the sum of its proper divisors (54855103077).

73138875364 is an frugal number, since it uses more digits than its factorization.

73138875364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 270446 (or 135223 counting only the distinct ones).

The product of its digits is 10160640, while the sum is 55.

The spelling of 73138875364 in words is "seventy-three billion, one hundred thirty-eight million, eight hundred seventy-five thousand, three hundred sixty-four".