186697347138 has 48 divisors (see below), whose sum is σ = 410365003776. Its totient is φ = 61333122240.

The previous prime is 186697347131. The next prime is 186697347163. The reversal of 186697347138 is 831743796681.

186697347138 is a `hidden beast` number, since 1 + 8 + 6 + 69 + 73 + 471 + 38 = 666.

It is not an unprimeable number, because it can be changed into a prime (186697347131) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1690143 + ... + 1797213.

It is an arithmetic number, because the mean of its divisors is an integer number (8549270912).

Almost surely, 2^186697347138 is an apocalyptic number.

186697347138 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

186697347138 is an abundant number, since it is smaller than the sum of its proper divisors (223667656638).

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

186697347138 is a wasteful number, since it uses less digits than its factorization.

186697347138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108479 (or 108476 counting only the distinct ones).

The product of its digits is 36578304, while the sum is 63.

The spelling of 186697347138 in words is "one hundred eighty-six billion, six hundred ninety-seven million, three hundred forty-seven thousand, one hundred thirty-eight".