123516777930 has 96 divisors (see below), whose sum is σ = 371364787584. Its totient is φ = 26060678784.

The previous prime is 123516777929. The next prime is 123516777947. The reversal of 123516777930 is 39777615321.

It is a happy number.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3212622 + ... + 3250841.

It is an arithmetic number, because the mean of its divisors is an integer number (3868383204).

Almost surely, 2^123516777930 is an apocalyptic number.

123516777930 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

123516777930 is an abundant number, since it is smaller than the sum of its proper divisors (247848009654).

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

123516777930 is a wasteful number, since it uses less digits than its factorization.

123516777930 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6463500 (or 6463493 counting only the distinct ones).

The product of its (nonzero) digits is 1666980, while the sum is 51.

The spelling of 123516777930 in words is "one hundred twenty-three billion, five hundred sixteen million, seven hundred seventy-seven thousand, nine hundred thirty".