189545163990 has 128 divisors (see below), whose sum is σ = 575019648000. Its totient is φ = 38911062528.

The previous prime is 189545163989. The next prime is 189545164009. The reversal of 189545163990 is 99361545981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 837240 + ... + 1039259.

It is an arithmetic number, because the mean of its divisors is an integer number (4492341000).

Almost surely, 2^189545163990 is an apocalyptic number.

189545163990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189545163990 is an abundant number, since it is smaller than the sum of its proper divisors (385474484010).

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

189545163990 is a wasteful number, since it uses less digits than its factorization.

189545163990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1876566.

The product of its (nonzero) digits is 10497600, while the sum is 60.

The spelling of 189545163990 in words is "one hundred eighty-nine billion, five hundred forty-five million, one hundred sixty-three thousand, nine hundred ninety".