123026656556643 has 24 divisors (see below), whose sum is σ = 191930329133568. Its totient is φ = 68666040847152.

The previous prime is 123026656556599. The next prime is 123026656556677. The reversal of 123026656556643 is 346655656620321.

It is not a de Polignac number, because 123026656556643 - 2¹⁸ = 123026656294499 is a prime.

It is a super-2 number, since 2×123026656556643² (a number of 29 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (123026656556543) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1584172155 + ... + 1584249812.

It is an arithmetic number, because the mean of its divisors is an integer number (7997097047232).

Almost surely, 2^{123026656556643} is an apocalyptic number.

123026656556643 is a deficient number, since it is larger than the sum of its proper divisors (68903672576925).

123026656556643 is an equidigital number, since it uses as much as digits as its factorization.

123026656556643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3168422063 (or 3168422020 counting only the distinct ones).

The product of its (nonzero) digits is 139968000, while the sum is 60.

The spelling of 123026656556643 in words is "one hundred twenty-three trillion, twenty-six billion, six hundred fifty-six million, five hundred fifty-six thousand, six hundred forty-three".