188121673812 has 24 divisors (see below), whose sum is σ = 438999537312. Its totient is φ = 62700229600.

The previous prime is 188121673793. The next prime is 188121673841. The reversal of 188121673812 is 218376121881.

It is a super-2 number, since 2×188121673812² (a number of 23 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

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, 761739 + ... + 978002.

It is an arithmetic number, because the mean of its divisors is an integer number (18291647388).

Almost surely, 2^188121673812 is an apocalyptic number.

188121673812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188121673812 is an abundant number, since it is smaller than the sum of its proper divisors (250877863500).

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

188121673812 is a wasteful number, since it uses less digits than its factorization.

188121673812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1748759 (or 1748757 counting only the distinct ones).

The product of its digits is 258048, while the sum is 48.

The spelling of 188121673812 in words is "one hundred eighty-eight billion, one hundred twenty-one million, six hundred seventy-three thousand, eight hundred twelve".