189817500672 has 132 divisors (see below), whose sum is σ = 551460817440. Its totient is φ = 62883827712.

The previous prime is 189817500671. The next prime is 189817500679. The reversal of 189817500672 is 276005718981.

It is a super-2 number, since 2×189817500672² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189817500671) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1439029 + ... + 1565387.

Almost surely, 2^189817500672 is an apocalyptic number.

189817500672 is a gapful number since it is divisible by the number (12) 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 189817500672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (275730408720).

189817500672 is an abundant number, since it is smaller than the sum of its proper divisors (361643316768).

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

189817500672 is a wasteful number, since it uses less digits than its factorization.

189817500672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126548 (or 126527 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 54.

The spelling of 189817500672 in words is "one hundred eighty-nine billion, eight hundred seventeen million, five hundred thousand, six hundred seventy-two".