91572633983 has 2 divisors, whose sum is σ = 91572633984. Its totient is φ = 91572633982.

The previous prime is 91572633979. The next prime is 91572633989. The reversal of 91572633983 is 38933627519.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 91572633983 - 2² = 91572633979 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (91572633989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45786316991 + 45786316992.

It is an arithmetic number, because the mean of its divisors is an integer number (45786316992).

Almost surely, 2^91572633983 is an apocalyptic number.

91572633983 is a deficient number, since it is larger than the sum of its proper divisors (1).

91572633983 is an equidigital number, since it uses as much as digits as its factorization.

91572633983 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 7348320, while the sum is 56.

The spelling of 91572633983 in words is "ninety-one billion, five hundred seventy-two million, six hundred thirty-three thousand, nine hundred eighty-three".