72163427751431 has 2 divisors, whose sum is σ = 72163427751432. Its totient is φ = 72163427751430.

The previous prime is 72163427751421. The next prime is 72163427751451. The reversal of 72163427751431 is 13415772436127.

It is a weak prime.

It is an emirp because it is prime and its reverse (13415772436127) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72163427751431 - 2⁶ = 72163427751367 is a prime.

It is a super-2 number, since 2×72163427751431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72163427751421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36081713875715 + 36081713875716.

It is an arithmetic number, because the mean of its divisors is an integer number (36081713875716).

Almost surely, 2^{72163427751431} is an apocalyptic number.

72163427751431 is a deficient number, since it is larger than the sum of its proper divisors (1).

72163427751431 is an equidigital number, since it uses as much as digits as its factorization.

72163427751431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5927040, while the sum is 53.

The spelling of 72163427751431 in words is "seventy-two trillion, one hundred sixty-three billion, four hundred twenty-seven million, seven hundred fifty-one thousand, four hundred thirty-one".