186764873646 has 64 divisors (see below), whose sum is σ = 426896870400. Its totient is φ = 53962384896.

The previous prime is 186764873639. The next prime is 186764873651. The reversal of 186764873646 is 646378467681.

It is a super-2 number, since 2×186764873646² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 421695 + ... + 742533.

It is an arithmetic number, because the mean of its divisors is an integer number (6670263600).

Almost surely, 2^186764873646 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 186764873646, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (213448435200).

186764873646 is an abundant number, since it is smaller than the sum of its proper divisors (240131996754).

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

186764873646 is a wasteful number, since it uses less digits than its factorization.

186764873646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321313.

The product of its digits is 195084288, while the sum is 66.

The spelling of 186764873646 in words is "one hundred eighty-six billion, seven hundred sixty-four million, eight hundred seventy-three thousand, six hundred forty-six".