188894261997 has 96 divisors (see below), whose sum is σ = 335622942720. Its totient is φ = 99962916480.

The previous prime is 188894261957. The next prime is 188894262041. The reversal of 188894261997 is 799162498881.

188894261997 is a `hidden beast` number, since 1 + 8 + 8 + 8 + 9 + 426 + 199 + 7 = 666.

It is not a de Polignac number, because 188894261997 - 2¹¹ = 188894259949 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188894261957) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 66440458 + ... + 66443300.

It is an arithmetic number, because the mean of its divisors is an integer number (3496072320).

Almost surely, 2^188894261997 is an apocalyptic number.

It is an amenable number.

188894261997 is a deficient number, since it is larger than the sum of its proper divisors (146728680723).

188894261997 is a wasteful number, since it uses less digits than its factorization.

188894261997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4103 (or 4100 counting only the distinct ones).

The product of its digits is 125411328, while the sum is 72.

The spelling of 188894261997 in words is "one hundred eighty-eight billion, eight hundred ninety-four million, two hundred sixty-one thousand, nine hundred ninety-seven".