123474636636 has 96 divisors (see below), whose sum is σ = 315156710400. Its totient is φ = 37396719360.

The previous prime is 123474636629. The next prime is 123474636643. The reversal of 123474636636 is 636636474321.

It is an interprime number because it is at equal distance from previous prime (123474636629) and next prime (123474636643).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4064110 + ... + 4094378.

It is an arithmetic number, because the mean of its divisors is an integer number (3282882400).

Almost surely, 2^123474636636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 123474636636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (157578355200).

123474636636 is an abundant number, since it is smaller than the sum of its proper divisors (191682073764).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

123474636636 is a wasteful number, since it uses less digits than its factorization.

123474636636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30699 (or 30697 counting only the distinct ones).

The product of its digits is 7838208, while the sum is 51.

The spelling of 123474636636 in words is "one hundred twenty-three billion, four hundred seventy-four million, six hundred thirty-six thousand, six hundred thirty-six".