123577708512 has 24 divisors (see below), whose sum is σ = 324391485096. Its totient is φ = 41192569472.

The previous prime is 123577708469. The next prime is 123577708517. The reversal of 123577708512 is 215807775321.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (123577708517) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 643633803 + ... + 643633994.

It is an arithmetic number, because the mean of its divisors is an integer number (13516311879).

Almost surely, 2^123577708512 is an apocalyptic number.

123577708512 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

123577708512 is an abundant number, since it is smaller than the sum of its proper divisors (200813776584).

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

123577708512 is a wasteful number, since it uses less digits than its factorization.

123577708512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1287267810 (or 1287267802 counting only the distinct ones).

The product of its (nonzero) digits is 823200, while the sum is 48.

The spelling of 123577708512 in words is "one hundred twenty-three billion, five hundred seventy-seven million, seven hundred eight thousand, five hundred twelve".