195821064 has 56 divisors (see below), whose sum is σ = 550511310. Its totient is φ = 65271744.

The previous prime is 195821051. The next prime is 195821089. The reversal of 195821064 is 460128591.

195821064 is a `hidden beast` number, since 1 + 9 + 582 + 10 + 64 = 666.

It can be written as a sum of positive squares in only one way, i.e., 150258564 + 45562500 = 12258^2 + 6750^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 13 ways as a sum of consecutive naturals, for example, 10957 + ... + 22620.

Almost surely, 2^195821064 is an apocalyptic number.

It is an amenable number.

195821064 is an abundant number, since it is smaller than the sum of its proper divisors (354690246).

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

195821064 is an equidigital number, since it uses as much as digits as its factorization.

195821064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33601 (or 33582 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 36.

The square root of 195821064 is about 13993.6079693552. The cubic root of 195821064 is about 580.7017506782.

The spelling of 195821064 in words is "one hundred ninety-five million, eight hundred twenty-one thousand, sixty-four".