189475892550 has 240 divisors, whose sum is σ = 613954677600. Its totient is φ = 43308457920.

The previous prime is 189475892539. The next prime is 189475892591. The reversal of 189475892550 is 55298574981.

189475892550 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 75 + 8 + 9 + 2 + 550 = 666.

It is a super-2 number, since 2×189475892550² (a number of 23 digits) contains 22 as substring.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 1320952 + ... + 1457348.

It is an arithmetic number, because the mean of its divisors is an integer number (2558144490).

Almost surely, 2^189475892550 is an apocalyptic number.

189475892550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 189475892550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (306977338800).

189475892550 is an abundant number, since it is smaller than the sum of its proper divisors (424478785050).

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

189475892550 is a wasteful number, since it uses less digits than its factorization.

189475892550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136442 (or 136414 counting only the distinct ones).

The product of its (nonzero) digits is 36288000, while the sum is 63.

The spelling of 189475892550 in words is "one hundred eighty-nine billion, four hundred seventy-five million, eight hundred ninety-two thousand, five hundred fifty".