72805164331 has 2 divisors, whose sum is σ = 72805164332. Its totient is φ = 72805164330.

The previous prime is 72805164259. The next prime is 72805164343. The reversal of 72805164331 is 13346150827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72805164331 - 2¹⁵ = 72805131563 is a prime.

It is a super-2 number, since 2×72805164331² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72805164371) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36402582165 + 36402582166.

It is an arithmetic number, because the mean of its divisors is an integer number (36402582166).

Almost surely, 2^72805164331 is an apocalyptic number.

72805164331 is a deficient number, since it is larger than the sum of its proper divisors (1).

72805164331 is an equidigital number, since it uses as much as digits as its factorization.

72805164331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 120960, while the sum is 40.

The spelling of 72805164331 in words is "seventy-two billion, eight hundred five million, one hundred sixty-four thousand, three hundred thirty-one".