91026635623 has 16 divisors (see below), whose sum is σ = 115629037056. Its totient is φ = 69591543840.

The previous prime is 91026635591. The next prime is 91026635627. The reversal of 91026635623 is 32653662019.

It is not a de Polignac number, because 91026635623 - 2⁵ = 91026635591 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 91026635623.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (91026635627) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11148411 + ... + 11156572.

It is an arithmetic number, because the mean of its divisors is an integer number (7226814816).

Almost surely, 2^91026635623 is an apocalyptic number.

91026635623 is a deficient number, since it is larger than the sum of its proper divisors (24602401433).

91026635623 is a wasteful number, since it uses less digits than its factorization.

91026635623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22305054.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 91026635623 in words is "ninety-one billion, twenty-six million, six hundred thirty-five thousand, six hundred twenty-three".