72322705315657 has 4 divisors (see below), whose sum is σ = 72326224518016. Its totient is φ = 72319186113300.

The previous prime is 72322705315613. The next prime is 72322705315673. The reversal of 72322705315657 is 75651350722327.

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 72322705315657 - 2³⁵ = 72288345577289 is a prime.

It is a super-2 number, since 2×72322705315657² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72322705315598 and 72322705315607.

It is not an unprimeable number, because it can be changed into a prime (72322705310657) 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, 1759570353 + ... + 1759611454.

It is an arithmetic number, because the mean of its divisors is an integer number (18081556129504).

Almost surely, 2^{72322705315657} is an apocalyptic number.

It is an amenable number.

72322705315657 is a deficient number, since it is larger than the sum of its proper divisors (3519202359).

72322705315657 is a wasteful number, since it uses less digits than its factorization.

72322705315657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519202358.

The product of its (nonzero) digits is 18522000, while the sum is 55.

The spelling of 72322705315657 in words is "seventy-two trillion, three hundred twenty-two billion, seven hundred five million, three hundred fifteen thousand, six hundred fifty-seven".