91572623851 has 2 divisors, whose sum is σ = 91572623852. Its totient is φ = 91572623850.

The previous prime is 91572623819. The next prime is 91572623983. The reversal of 91572623851 is 15832627519.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91572623851 - 2⁵ = 91572623819 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 91572623795 and 91572623804.

It is not a weakly prime, because it can be changed into another prime (91572623251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45786311925 + 45786311926.

It is an arithmetic number, because the mean of its divisors is an integer number (45786311926).

Almost surely, 2^91572623851 is an apocalyptic number.

91572623851 is a deficient number, since it is larger than the sum of its proper divisors (1).

91572623851 is an equidigital number, since it uses as much as digits as its factorization.

91572623851 is an evil number, because the sum of its binary digits is even.

The product of its digits is 907200, while the sum is 49.

The spelling of 91572623851 in words is "ninety-one billion, five hundred seventy-two million, six hundred twenty-three thousand, eight hundred fifty-one".