123204162564 has 60 divisors (see below), whose sum is σ = 368091455424. Its totient is φ = 35201188656.

The previous prime is 123204162551. The next prime is 123204162589. The reversal of 123204162564 is 465261402321.

123204162564 is a `hidden beast` number, since 1 + 2 + 3 + 20 + 4 + 1 + 625 + 6 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27159144 + ... + 27163679.

Almost surely, 2^123204162564 is an apocalyptic number.

123204162564 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

123204162564 is an abundant number, since it is smaller than the sum of its proper divisors (244887292860).

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

123204162564 is a wasteful number, since it uses less digits than its factorization.

123204162564 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54322846 (or 54322835 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 123204162564 its reverse (465261402321), we get a palindrome (588465564885).

The spelling of 123204162564 in words is "one hundred twenty-three billion, two hundred four million, one hundred sixty-two thousand, five hundred sixty-four".