186918374164 has 6 divisors (see below), whose sum is σ = 327107154794. Its totient is φ = 93459187080.

The previous prime is 186918374161. The next prime is 186918374179. The reversal of 186918374164 is 461473819681.

It can be written as a sum of positive squares in only one way, i.e., 180716811664 + 6201562500 = 425108^2 + 78750^2 .

It is a super-2 number, since 2×186918374164² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 186918374099 and 186918374108.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (186918374161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23364796767 + ... + 23364796774.

Almost surely, 2^186918374164 is an apocalyptic number.

It is an amenable number.

186918374164 is a deficient number, since it is larger than the sum of its proper divisors (140188780630).

186918374164 is a wasteful number, since it uses less digits than its factorization.

186918374164 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46729593545 (or 46729593543 counting only the distinct ones).

The product of its digits is 6967296, while the sum is 58.

The spelling of 186918374164 in words is "one hundred eighty-six billion, nine hundred eighteen million, three hundred seventy-four thousand, one hundred sixty-four".