1795516920961 has 3 divisors (see below), whose sum is σ = 1795518260931. Its totient is φ = 1795515580992.

The previous prime is 1795516920877. The next prime is 1795516920983. The reversal of 1795516920961 is 1690296155971.

The square root of 1795516920961 is 1339969.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 452880961 + 1795064040000 = 21281^2 + 1339800^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1795516920961 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1795516920961.

It is not an unprimeable number, because it can be changed into a prime (1795516920991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 669985 + ... + 2009953.

It is an arithmetic number, because the mean of its divisors is an integer number (598506086977).

Almost surely, 2^{1795516920961} is an apocalyptic number.

1795516920961 is the 1339969-th square number.

1795516920961 is the 669985-th centered octagonal number.

It is an amenable number.

1795516920961 is a deficient number, since it is larger than the sum of its proper divisors (1339970).

1795516920961 is an frugal number, since it uses more digits than its factorization.

1795516920961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2679938 (or 1339969 counting only the distinct ones).

The product of its (nonzero) digits is 9185400, while the sum is 61.

The spelling of 1795516920961 in words is "one trillion, seven hundred ninety-five billion, five hundred sixteen million, nine hundred twenty thousand, nine hundred sixty-one".