195186356401 has 3 divisors (see below), whose sum is σ = 195186798201. Its totient is φ = 195185914602.

The previous prime is 195186356371. The next prime is 195186356423. The reversal of 195186356401 is 104653681591.

The square root of 195186356401 is 441799.

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, and also an emirpimes, since its reverse is a distinct semiprime: 104653681591 = 823 ⋅127161217.

It is not a de Polignac number, because 195186356401 - 2⁵ = 195186356369 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (195186356471) 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, 220900 + ... + 662698.

It is an arithmetic number, because the mean of its divisors is an integer number (65062266067).

Almost surely, 2^195186356401 is an apocalyptic number.

195186356401 is the 441799-th square number.

195186356401 is the 220900-th centered octagonal number.

It is an amenable number.

195186356401 is a deficient number, since it is larger than the sum of its proper divisors (441800).

195186356401 is an frugal number, since it uses more digits than its factorization.

195186356401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883598 (or 441799 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 49.

Multiplying 195186356401 by its sum of digits (49), we get a square (9564131463649 = 3092593²).

The spelling of 195186356401 in words is "one hundred ninety-five billion, one hundred eighty-six million, three hundred fifty-six thousand, four hundred one".