73138620724 has 12 divisors (see below), whose sum is σ = 137838169924. Its totient is φ = 33756286464.

The previous prime is 73138620721. The next prime is 73138620727. The reversal of 73138620724 is 42702683137.

It is an interprime number because it is at equal distance from previous prime (73138620721) and next prime (73138620727).

It can be written as a sum of positive squares in 2 ways, for example, as 48429924624 + 24708696100 = 220068^2 + 157190^2 .

It is a hoax number, since the sum of its digits (43) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (73138620721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703255917 + ... + 703256020.

Almost surely, 2^73138620724 is an apocalyptic number.

It is an amenable number.

73138620724 is a deficient number, since it is larger than the sum of its proper divisors (64699549200).

73138620724 is a wasteful number, since it uses less digits than its factorization.

73138620724 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1406511954 (or 1406511952 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 43.

The spelling of 73138620724 in words is "seventy-three billion, one hundred thirty-eight million, six hundred twenty thousand, seven hundred twenty-four".