195361163591 has 6 divisors (see below), whose sum is σ = 214735824576. Its totient is φ = 177601057700.

The previous prime is 195361163587. The next prime is 195361163593.

195361163591 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 195361163591 - 2² = 195361163587 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (195361163593) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 807277415 + ... + 807277656.

It is an arithmetic number, because the mean of its divisors is an integer number (35789304096).

Almost surely, 2^195361163591 is an apocalyptic number.

195361163591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

195361163591 is a deficient number, since it is larger than the sum of its proper divisors (19374660985).

195361163591 is a wasteful number, since it uses less digits than its factorization.

195361163591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1614555093 (or 1614555082 counting only the distinct ones).

The product of its digits is 656100, while the sum is 50.

The spelling of 195361163591 in words is "one hundred ninety-five billion, three hundred sixty-one million, one hundred sixty-three thousand, five hundred ninety-one".