194368521461 has 4 divisors (see below), whose sum is σ = 201070884300. Its totient is φ = 187666158624.

The previous prime is 194368521427. The next prime is 194368521467. The reversal of 194368521461 is 164125863491.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 160315355236 + 34053166225 = 400394^2 + 184535^2 .

It is a cyclic number.

It is not a de Polignac number, because 194368521461 - 2²⁶ = 194301412597 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 (194368521467) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3351181376 + ... + 3351181433.

It is an arithmetic number, because the mean of its divisors is an integer number (50267721075).

Almost surely, 2^194368521461 is an apocalyptic number.

It is an amenable number.

194368521461 is a deficient number, since it is larger than the sum of its proper divisors (6702362839).

194368521461 is an equidigital number, since it uses as much as digits as its factorization.

194368521461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6702362838.

The product of its digits is 1244160, while the sum is 50.

The spelling of 194368521461 in words is "one hundred ninety-four billion, three hundred sixty-eight million, five hundred twenty-one thousand, four hundred sixty-one".