72326227691 has 2 divisors, whose sum is σ = 72326227692. Its totient is φ = 72326227690.

The previous prime is 72326227669. The next prime is 72326227693. The reversal of 72326227691 is 19672262327.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72326227691 is a prime.

Together with 72326227693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72326227693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36163113845 + 36163113846.

It is an arithmetic number, because the mean of its divisors is an integer number (36163113846).

Almost surely, 2^72326227691 is an apocalyptic number.

72326227691 is a deficient number, since it is larger than the sum of its proper divisors (1).

72326227691 is an equidigital number, since it uses as much as digits as its factorization.

72326227691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 47.

The spelling of 72326227691 in words is "seventy-two billion, three hundred twenty-six million, two hundred twenty-seven thousand, six hundred ninety-one".