186401329856 has 56 divisors (see below), whose sum is σ = 437308569120. Its totient is φ = 77131579392.

The previous prime is 186401329841. The next prime is 186401329861. The reversal of 186401329856 is 658923104681.

It is a tau number, because it is divible by the number of its divisors (56).

It is a junction number, because it is equal to n+sod(n) for n = 186401329798 and 186401329807.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7160705 + ... + 7186688.

Almost surely, 2^186401329856 is an apocalyptic number.

186401329856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

186401329856 is an abundant number, since it is smaller than the sum of its proper divisors (250907239264).

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

186401329856 is a wasteful number, since it uses less digits than its factorization.

186401329856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14347441 (or 14347431 counting only the distinct ones).

The product of its (nonzero) digits is 2488320, while the sum is 53.

The spelling of 186401329856 in words is "one hundred eighty-six billion, four hundred one million, three hundred twenty-nine thousand, eight hundred fifty-six".