188138580620 has 48 divisors (see below), whose sum is σ = 402985679040. Its totient is φ = 73754793216.

The previous prime is 188138580613. The next prime is 188138580631. The reversal of 188138580620 is 26085831881.

It is a super-2 number, since 2×188138580620² (a number of 23 digits) contains 22 as substring.

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 15 ways as a sum of consecutive naturals, for example, 877574 + ... + 1070706.

It is an arithmetic number, because the mean of its divisors is an integer number (8395534980).

Almost surely, 2^188138580620 is an apocalyptic number.

188138580620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188138580620 is an abundant number, since it is smaller than the sum of its proper divisors (214847098420).

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

188138580620 is a wasteful number, since it uses less digits than its factorization.

188138580620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194114 (or 194112 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 50.

The spelling of 188138580620 in words is "one hundred eighty-eight billion, one hundred thirty-eight million, five hundred eighty thousand, six hundred twenty".