188006978880 has 672 divisors, whose sum is σ = 774306604800. Its totient is φ = 42818678784.

The previous prime is 188006978857. The next prime is 188006978893. The reversal of 188006978880 is 88879600881.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (672).

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 151985622 + ... + 151986858.

Almost surely, 2^188006978880 is an apocalyptic number.

188006978880 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 188006978880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (387153302400).

188006978880 is an abundant number, since it is smaller than the sum of its proper divisors (586299625920).

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

188006978880 is a wasteful number, since it uses less digits than its factorization.

188006978880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636 (or 1613 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 63.

The spelling of 188006978880 in words is "one hundred eighty-eight billion, six million, nine hundred seventy-eight thousand, eight hundred eighty".