123564516 has 12 divisors (see below), whose sum is σ = 288317232. Its totient is φ = 41188168.

The previous prime is 123564491. The next prime is 123564527. The reversal of 123564516 is 615465321.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×123564516² = 30536379228628512, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5148510 + ... + 5148533.

It is an arithmetic number, because the mean of its divisors is an integer number (24026436).

Almost surely, 2^123564516 is an apocalyptic number.

It is an amenable number.

123564516 is an abundant number, since it is smaller than the sum of its proper divisors (164752716).

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

123564516 is a wasteful number, since it uses less digits than its factorization.

123564516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10297050 (or 10297048 counting only the distinct ones).

The product of its digits is 21600, while the sum is 33.

The square root of 123564516 is about 11115.9577185234. The cubic root of 123564516 is about 498.0786476004.

The spelling of 123564516 in words is "one hundred twenty-three million, five hundred sixty-four thousand, five hundred sixteen".