72436862431 has 2 divisors, whose sum is σ = 72436862432. Its totient is φ = 72436862430.

The previous prime is 72436862383. The next prime is 72436862437. The reversal of 72436862431 is 13426863427.

It is a strong prime.

It is an emirp because it is prime and its reverse (13426863427) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 72436862431 - 2¹³ = 72436854239 is a prime.

It is a super-2 number, since 2×72436862431² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72436862437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36218431215 + 36218431216.

It is an arithmetic number, because the mean of its divisors is an integer number (36218431216).

Almost surely, 2^72436862431 is an apocalyptic number.

72436862431 is a deficient number, since it is larger than the sum of its proper divisors (1).

72436862431 is an equidigital number, since it uses as much as digits as its factorization.

72436862431 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1161216, while the sum is 46.

The spelling of 72436862431 in words is "seventy-two billion, four hundred thirty-six million, eight hundred sixty-two thousand, four hundred thirty-one".