186976678464 has 189 divisors, whose sum is σ = 550000986483. Its totient is φ = 60730838784.

The previous prime is 186976678457. The next prime is 186976678489. The reversal of 186976678464 is 464876679681.

The square root of 186976678464 is 432408.

It is a perfect power (a square), and thus also a powerful number.

186976678464 is a `hidden beast` number, since 1 + 8 + 6 + 97 + 6 + 6 + 78 + 464 = 666.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 186976678392 and 186976678401.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 446244847 + ... + 446245265.

Almost surely, 2^186976678464 is an apocalyptic number.

186976678464 is the 432408-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186976678464

186976678464 is an abundant number, since it is smaller than the sum of its proper divisors (363024308019).

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

186976678464 is an frugal number, since it uses more digits than its factorization.

186976678464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 942 (or 467 counting only the distinct ones).

The product of its digits is 585252864, while the sum is 72.

The spelling of 186976678464 in words is "one hundred eighty-six billion, nine hundred seventy-six million, six hundred seventy-eight thousand, four hundred sixty-four".