188013400808 has 8 divisors (see below), whose sum is σ = 352525126530. Its totient is φ = 94006700400.

The previous prime is 188013400789. The next prime is 188013400829. The reversal of 188013400808 is 808004310881.

It can be written as a sum of positive squares in only one way, i.e., 177913552804 + 10099848004 = 421798^2 + 100498^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 11750837543 + ... + 11750837558.

Almost surely, 2^188013400808 is an apocalyptic number.

It is an amenable number.

188013400808 is a deficient number, since it is larger than the sum of its proper divisors (164511725722).

188013400808 is a wasteful number, since it uses less digits than its factorization.

188013400808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23501675107 (or 23501675103 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The spelling of 188013400808 in words is "one hundred eighty-eight billion, thirteen million, four hundred thousand, eight hundred eight".