123553215516 has 48 divisors (see below), whose sum is σ = 289195167744. Its totient is φ = 41055330816.

The previous prime is 123553215509. The next prime is 123553215529. The reversal of 123553215516 is 615512355321.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10440795 + ... + 10452621.

It is an arithmetic number, because the mean of its divisors is an integer number (6024899328).

Almost surely, 2^123553215516 is an apocalyptic number.

It is an amenable number.

123553215516 is an abundant number, since it is smaller than the sum of its proper divisors (165641952228).

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

123553215516 is a wasteful number, since it uses less digits than its factorization.

123553215516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14490 (or 14488 counting only the distinct ones).

The product of its digits is 135000, while the sum is 39.

The spelling of 123553215516 in words is "one hundred twenty-three billion, five hundred fifty-three million, two hundred fifteen thousand, five hundred sixteen".