72323656377 has 32 divisors (see below), whose sum is σ = 115037829120. Its totient is φ = 39517632000.

The previous prime is 72323656373. The next prime is 72323656381. The reversal of 72323656377 is 77365632327.

It is an interprime number because it is at equal distance from previous prime (72323656373) and next prime (72323656381).

It is not a de Polignac number, because 72323656377 - 2² = 72323656373 is a prime.

It is a super-2 number, since 2×72323656377² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72323656373) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1507002 + ... + 1554252.

It is an arithmetic number, because the mean of its divisors is an integer number (3594932160).

Almost surely, 2^72323656377 is an apocalyptic number.

It is an amenable number.

72323656377 is a deficient number, since it is larger than the sum of its proper divisors (42714172743).

72323656377 is a wasteful number, since it uses less digits than its factorization.

72323656377 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 50453.

The product of its digits is 6667920, while the sum is 51.

The spelling of 72323656377 in words is "seventy-two billion, three hundred twenty-three million, six hundred fifty-six thousand, three hundred seventy-seven".