188900794449 has 48 divisors (see below), whose sum is σ = 287003135952. Its totient is φ = 119593304064.

The previous prime is 188900794421. The next prime is 188900794457. The reversal of 188900794449 is 944497009881.

It is a happy number.

188900794449 is a `hidden beast` number, since 18 + 8 + 90 + 0 + 7 + 94 + 449 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 5477036049 + 183423758400 = 74007^2 + 428280^2 .

It is not a de Polignac number, because 188900794449 - 2⁵ = 188900794417 is a prime.

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (188900799449) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3378529 + ... + 3433985.

It is an arithmetic number, because the mean of its divisors is an integer number (5979231999).

Almost surely, 2^188900794449 is an apocalyptic number.

It is an amenable number.

188900794449 is a deficient number, since it is larger than the sum of its proper divisors (98102341503).

188900794449 is a wasteful number, since it uses less digits than its factorization.

188900794449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55746 (or 55743 counting only the distinct ones).

The product of its (nonzero) digits is 20901888, while the sum is 63.

The spelling of 188900794449 in words is "one hundred eighty-eight billion, nine hundred million, seven hundred ninety-four thousand, four hundred forty-nine".