91622868031 has 4 divisors (see below), whose sum is σ = 92990373592. Its totient is φ = 90255362472.

The previous prime is 91622867983. The next prime is 91622868037. The reversal of 91622868031 is 13086822619.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-91622868031 is a prime.

It is a super-2 number, since 2×91622868031² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91622868037) 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 in 3 ways as a sum of consecutive naturals, for example, 683752680 + ... + 683752813.

It is an arithmetic number, because the mean of its divisors is an integer number (23247593398).

Almost surely, 2^91622868031 is an apocalyptic number.

91622868031 is a deficient number, since it is larger than the sum of its proper divisors (1367505561).

91622868031 is a wasteful number, since it uses less digits than its factorization.

91622868031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1367505560.

The product of its (nonzero) digits is 248832, while the sum is 46.

The spelling of 91622868031 in words is "ninety-one billion, six hundred twenty-two million, eight hundred sixty-eight thousand, thirty-one".