189491562000 has 400 divisors, whose sum is σ = 737116331952. Its totient is φ = 46643558400.

The previous prime is 189491561947. The next prime is 189491562017. The reversal of 189491562000 is 265194981.

189491562000 is a `hidden beast` number, since 1 + 8 + 9 + 4 + 9 + 15 + 620 + 0 + 0 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 41694372864 + 147797189136 = 204192^2 + 384444^2 .

It is a tau number, because it is divible by the number of its divisors (400).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2061012 + ... + 2150988.

Almost surely, 2^189491562000 is an apocalyptic number.

189491562000 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 189491562000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368558165976).

189491562000 is an abundant number, since it is smaller than the sum of its proper divisors (547624769952).

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

189491562000 is a wasteful number, since it uses less digits than its factorization.

189491562000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90025 (or 90000 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The spelling of 189491562000 in words is "one hundred eighty-nine billion, four hundred ninety-one million, five hundred sixty-two thousand".