123353926491 has 16 divisors (see below), whose sum is σ = 175744404000. Its totient is φ = 76688460288.

The previous prime is 123353926471. The next prime is 123353926513. The reversal of 123353926491 is 194629353321.

It is not a de Polignac number, because 123353926491 - 2¹⁸ = 123353664347 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 123353926491.

It is not an unprimeable number, because it can be changed into a prime (123353926441) 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, 11089416 + ... + 11100533.

It is an arithmetic number, because the mean of its divisors is an integer number (10984025250).

Almost surely, 2^123353926491 is an apocalyptic number.

123353926491 is a deficient number, since it is larger than the sum of its proper divisors (52390477509).

123353926491 is a wasteful number, since it uses less digits than its factorization.

123353926491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22190078.

The product of its digits is 1049760, while the sum is 48.

The spelling of 123353926491 in words is "one hundred twenty-three billion, three hundred fifty-three million, nine hundred twenty-six thousand, four hundred ninety-one".