195928521285 has 16 divisors (see below), whose sum is σ = 358269296256. Its totient is φ = 89567323968.

The previous prime is 195928521263. The next prime is 195928521287. The reversal of 195928521285 is 582125829591.

It is a happy number.

It is not a de Polignac number, because 195928521285 - 2⁷ = 195928521157 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195928521287) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 932992854 + ... + 932993063.

It is an arithmetic number, because the mean of its divisors is an integer number (22391831016).

Almost surely, 2^195928521285 is an apocalyptic number.

195928521285 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

195928521285 is a deficient number, since it is larger than the sum of its proper divisors (162340774971).

195928521285 is a wasteful number, since it uses less digits than its factorization.

195928521285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1865985932.

The product of its digits is 5184000, while the sum is 57.

The spelling of 195928521285 in words is "one hundred ninety-five billion, nine hundred twenty-eight million, five hundred twenty-one thousand, two hundred eighty-five".