189856743552 has 768 divisors, whose sum is σ = 672901931520. Its totient is φ = 50217615360.

The previous prime is 189856743547. The next prime is 189856743581. The reversal of 189856743552 is 255347658981.

189856743552 is a `hidden beast` number, since 1 + 8 + 9 + 8 + 5 + 6 + 74 + 3 + 552 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a self number, because there is not a number n which added to its sum of digits gives 189856743552.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1097437738 + ... + 1097437910.

It is an arithmetic number, because the mean of its divisors is an integer number (876174390).

Almost surely, 2^189856743552 is an apocalyptic number.

189856743552 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 189856743552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (336450965760).

189856743552 is an abundant number, since it is smaller than the sum of its proper divisors (483045187968).

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

189856743552 is a wasteful number, since it uses less digits than its factorization.

189856743552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 366 counting only the distinct ones).

The product of its digits is 72576000, while the sum is 63.

The spelling of 189856743552 in words is "one hundred eighty-nine billion, eight hundred fifty-six million, seven hundred forty-three thousand, five hundred fifty-two".