123664356 has 36 divisors (see below), whose sum is σ = 316369872. Its totient is φ = 40723824.

The previous prime is 123664327. The next prime is 123664361. The reversal of 123664356 is 653466321.

123664356 is a `hidden beast` number, since 1 + 2 + 3 + 6 + 643 + 5 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

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

It is a self number, because there is not a number n which added to its sum of digits gives 123664356.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17706 + ... + 23681.

It is an arithmetic number, because the mean of its divisors is an integer number (8788052).

Almost surely, 2^123664356 is an apocalyptic number.

It is an amenable number.

123664356 is an abundant number, since it is smaller than the sum of its proper divisors (192705516).

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

123664356 is a wasteful number, since it uses less digits than its factorization.

123664356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41480 (or 41475 counting only the distinct ones).

The product of its digits is 77760, while the sum is 36.

The square root of 123664356 is about 11120.4476528600. The cubic root of 123664356 is about 498.2127604950.

The spelling of 123664356 in words is "one hundred twenty-three million, six hundred sixty-four thousand, three hundred fifty-six".