72172651536593 has 4 divisors (see below), whose sum is σ = 72172668546468. Its totient is φ = 72172634526720.

The previous prime is 72172651536539. The next prime is 72172651536599. The reversal of 72172651536593 is 39563515627127.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 40135557279169 + 32037094257424 = 6335263^2 + 5660132^2 .

It is a cyclic number.

It is not a de Polignac number, because 72172651536593 - 2³⁰ = 72171577794769 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72172651536599) 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, 3650033 + ... + 12556593.

It is an arithmetic number, because the mean of its divisors is an integer number (18043167136617).

Almost surely, 2^{72172651536593} is an apocalyptic number.

It is an amenable number.

72172651536593 is a deficient number, since it is larger than the sum of its proper divisors (17009875).

72172651536593 is an equidigital number, since it uses as much as digits as its factorization.

72172651536593 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17009874.

The product of its digits is 71442000, while the sum is 62.

The spelling of 72172651536593 in words is "seventy-two trillion, one hundred seventy-two billion, six hundred fifty-one million, five hundred thirty-six thousand, five hundred ninety-three".