188426638032 has 40 divisors (see below), whose sum is σ = 489290957184. Its totient is φ = 62483441664.

The previous prime is 188426638021. The next prime is 188426638051. The reversal of 188426638032 is 230836624881.

It is a congruent number.

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, 10160568 + ... + 10179095.

Almost surely, 2^188426638032 is an apocalyptic number.

188426638032 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188426638032 is an abundant number, since it is smaller than the sum of its proper divisors (300864319152).

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

188426638032 is a wasteful number, since it uses less digits than its factorization.

188426638032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20339867 (or 20339861 counting only the distinct ones).

The product of its (nonzero) digits is 2654208, while the sum is 51.

The spelling of 188426638032 in words is "one hundred eighty-eight billion, four hundred twenty-six million, six hundred thirty-eight thousand, thirty-two".