72431364191 has 2 divisors, whose sum is σ = 72431364192. Its totient is φ = 72431364190.

The previous prime is 72431364067. The next prime is 72431364209. The reversal of 72431364191 is 19146313427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72431364191 - 2²² = 72427169887 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72431364791) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36215682095 + 36215682096.

It is an arithmetic number, because the mean of its divisors is an integer number (36215682096).

Almost surely, 2^72431364191 is an apocalyptic number.

72431364191 is a deficient number, since it is larger than the sum of its proper divisors (1).

72431364191 is an equidigital number, since it uses as much as digits as its factorization.

72431364191 is an evil number, because the sum of its binary digits is even.

The product of its digits is 108864, while the sum is 41.

The spelling of 72431364191 in words is "seventy-two billion, four hundred thirty-one million, three hundred sixty-four thousand, one hundred ninety-one".