73932136521 has 4 divisors (see below), whose sum is σ = 98576182032. Its totient is φ = 49288091012.

The previous prime is 73932136511. The next prime is 73932136543. The reversal of 73932136521 is 12563123937.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 73932136521 - 2⁷ = 73932136393 is a prime.

It is not an unprimeable number, because it can be changed into a prime (73932136511) 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, 12322022751 + ... + 12322022756.

It is an arithmetic number, because the mean of its divisors is an integer number (24644045508).

Almost surely, 2^73932136521 is an apocalyptic number.

It is an amenable number.

73932136521 is a deficient number, since it is larger than the sum of its proper divisors (24644045511).

73932136521 is a wasteful number, since it uses less digits than its factorization.

73932136521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24644045510.

The product of its digits is 204120, while the sum is 42.

The spelling of 73932136521 in words is "seventy-three billion, nine hundred thirty-two million, one hundred thirty-six thousand, five hundred twenty-one".