91590633321 has 64 divisors (see below), whose sum is σ = 143909498880. Its totient is φ = 51191229440.

The previous prime is 91590633283. The next prime is 91590633359. The reversal of 91590633321 is 12333609519.

It is an interprime number because it is at equal distance from previous prime (91590633283) and next prime (91590633359).

It is a cyclic number.

It is not a de Polignac number, because 91590633321 - 2¹⁹ = 91590109033 is a prime.

It is a super-2 number, since 2×91590633321² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (91590633221) 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 in 63 ways as a sum of consecutive naturals, for example, 30296416 + ... + 30299438.

It is an arithmetic number, because the mean of its divisors is an integer number (2248585920).

Almost surely, 2^91590633321 is an apocalyptic number.

It is an amenable number.

91590633321 is a deficient number, since it is larger than the sum of its proper divisors (52318865559).

91590633321 is a wasteful number, since it uses less digits than its factorization.

91590633321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4126.

The product of its (nonzero) digits is 131220, while the sum is 42.

The spelling of 91590633321 in words is "ninety-one billion, five hundred ninety million, six hundred thirty-three thousand, three hundred twenty-one".