123940511616 has 64 divisors (see below), whose sum is σ = 330099984720. Its totient is φ = 41202696192.

The previous prime is 123940511603. The next prime is 123940511621. The reversal of 123940511616 is 616115049321.

123940511616 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×123940511616² (a number of 23 digits) contains 22 as substring.

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, 289425 + ... + 575888.

Almost surely, 2^123940511616 is an apocalyptic number.

123940511616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

123940511616 is an abundant number, since it is smaller than the sum of its proper divisors (206159473104).

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

123940511616 is an equidigital number, since it uses as much as digits as its factorization.

123940511616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 865703 (or 865691 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 39.

The spelling of 123940511616 in words is "one hundred twenty-three billion, nine hundred forty million, five hundred eleven thousand, six hundred sixteen".