72641313923 has 2 divisors, whose sum is σ = 72641313924. Its totient is φ = 72641313922.

The previous prime is 72641313917. The next prime is 72641313947. The reversal of 72641313923 is 32931314627.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72641313923 - 2⁴ = 72641313907 is a prime.

It is not a weakly prime, because it can be changed into another prime (72641303923) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36320656961 + 36320656962.

It is an arithmetic number, because the mean of its divisors is an integer number (36320656962).

Almost surely, 2^72641313923 is an apocalyptic number.

72641313923 is a deficient number, since it is larger than the sum of its proper divisors (1).

72641313923 is an equidigital number, since it uses as much as digits as its factorization.

72641313923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 163296, while the sum is 41.

The spelling of 72641313923 in words is "seventy-two billion, six hundred forty-one million, three hundred thirteen thousand, nine hundred twenty-three".