123315777120 has 48 divisors (see below), whose sum is σ = 388444699440. Its totient is φ = 32884207104.

The previous prime is 123315777113. The next prime is 123315777173. The reversal of 123315777120 is 21777513321.

It is a tau number, because it is divible by the number of its divisors (48).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 128453455 + ... + 128454414.

It is an arithmetic number, because the mean of its divisors is an integer number (8092597905).

Almost surely, 2^123315777120 is an apocalyptic number.

123315777120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

123315777120 is an abundant number, since it is smaller than the sum of its proper divisors (265128922320).

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

123315777120 is a wasteful number, since it uses less digits than its factorization.

123315777120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256907887 (or 256907879 counting only the distinct ones).

The product of its (nonzero) digits is 61740, while the sum is 39.

The spelling of 123315777120 in words is "one hundred twenty-three billion, three hundred fifteen million, seven hundred seventy-seven thousand, one hundred twenty".