165196858590 has 160 divisors (see below), whose sum is σ = 474644396160. Its totient is φ = 41080421376.

The previous prime is 165196858579. The next prime is 165196858609. The reversal of 165196858590 is 95858691561.

165196858590 is a `hidden beast` number, since 1 + 6 + 519 + 68 + 5 + 8 + 59 + 0 = 666.

It is a congruent number.

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, 1445899 + ... + 1555961.

It is an arithmetic number, because the mean of its divisors is an integer number (2966527476).

Almost surely, 2^165196858590 is an apocalyptic number.

165196858590 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 165196858590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (237322198080).

165196858590 is an abundant number, since it is smaller than the sum of its proper divisors (309447537570).

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

165196858590 is a wasteful number, since it uses less digits than its factorization.

165196858590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 110208 (or 110199 counting only the distinct ones).

The product of its (nonzero) digits is 23328000, while the sum is 63.

The spelling of 165196858590 in words is "one hundred sixty-five billion, one hundred ninety-six million, eight hundred fifty-eight thousand, five hundred ninety".