195641514721 has 8 divisors (see below), whose sum is σ = 196343902440. Its totient is φ = 194940375168.

The previous prime is 195641514659. The next prime is 195641514727. The reversal of 195641514721 is 127415146591.

It can be written as a sum of positive squares in 4 ways, for example, as 45377520400 + 150263994321 = 213020^2 + 387639^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 195641514721 - 2³³ = 187051580129 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195641514727) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2575 + ... + 625531.

It is an arithmetic number, because the mean of its divisors is an integer number (24542987805).

Almost surely, 2^195641514721 is an apocalyptic number.

It is an amenable number.

195641514721 is a deficient number, since it is larger than the sum of its proper divisors (702387719).

195641514721 is an equidigital number, since it uses as much as digits as its factorization.

195641514721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624083.

The product of its digits is 302400, while the sum is 46.

The spelling of 195641514721 in words is "one hundred ninety-five billion, six hundred forty-one million, five hundred fourteen thousand, seven hundred twenty-one".