123616516542 has 32 divisors (see below), whose sum is σ = 258002986752. Its totient is φ = 39410800704.

The previous prime is 123616516483. The next prime is 123616516553. The reversal of 123616516542 is 245615616321.

It is a junction number, because it is equal to n+sod(n) for n = 123616516494 and 123616516503.

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, 2187973 + ... + 2243759.

It is an arithmetic number, because the mean of its divisors is an integer number (8062593336).

Almost surely, 2^123616516542 is an apocalyptic number.

123616516542 is an abundant number, since it is smaller than the sum of its proper divisors (134386470210).

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

123616516542 is a wasteful number, since it uses less digits than its factorization.

123616516542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71872.

The product of its digits is 259200, while the sum is 42.

The spelling of 123616516542 in words is "one hundred twenty-three billion, six hundred sixteen million, five hundred sixteen thousand, five hundred forty-two".