189886700640 has 1536 divisors, whose sum is σ = 822865526784. Its totient is φ = 35672555520.

The previous prime is 189886700639. The next prime is 189886700681. The reversal of 189886700640 is 46007688981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 255 ways as a sum of consecutive naturals, for example, 1680413224 + ... + 1680413336.

It is an arithmetic number, because the mean of its divisors is an integer number (535719744).

Almost surely, 2^189886700640 is an apocalyptic number.

189886700640 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 189886700640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (411432763392).

189886700640 is an abundant number, since it is smaller than the sum of its proper divisors (632978826144).

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

189886700640 is a wasteful number, since it uses less digits than its factorization.

189886700640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272 (or 264 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 57.

The spelling of 189886700640 in words is "one hundred eighty-nine billion, eight hundred eighty-six million, seven hundred thousand, six hundred forty".