72423908457 has 32 divisors (see below), whose sum is σ = 97766095488. Its totient is φ = 47687118336.

The previous prime is 72423908411. The next prime is 72423908489. The reversal of 72423908457 is 75480932427.

It is not a de Polignac number, because 72423908457 - 2⁶ = 72423908393 is a prime.

It is a super-2 number, since 2×72423908457² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (72423908057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64490898 + ... + 64492020.

It is an arithmetic number, because the mean of its divisors is an integer number (3055190484).

Almost surely, 2^72423908457 is an apocalyptic number.

It is an amenable number.

72423908457 is a deficient number, since it is larger than the sum of its proper divisors (25342187031).

72423908457 is a wasteful number, since it uses less digits than its factorization.

72423908457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2009.

The product of its (nonzero) digits is 3386880, while the sum is 51.

The spelling of 72423908457 in words is "seventy-two billion, four hundred twenty-three million, nine hundred eight thousand, four hundred fifty-seven".