194939771365 has 16 divisors (see below), whose sum is σ = 239391427968. Its totient is φ = 152310062016.

The previous prime is 194939771309. The next prime is 194939771399. The reversal of 194939771365 is 563177939491.

It is a cyclic number.

It is not a de Polignac number, because 194939771365 - 2²³ = 194931382757 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 194939771297 and 194939771306.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2480464 + ... + 2557846.

It is an arithmetic number, because the mean of its divisors is an integer number (14961964248).

Almost surely, 2^194939771365 is an apocalyptic number.

It is an amenable number.

194939771365 is a deficient number, since it is larger than the sum of its proper divisors (44451656603).

194939771365 is a wasteful number, since it uses less digits than its factorization.

194939771365 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89148.

The product of its digits is 38578680, while the sum is 64.

The spelling of 194939771365 in words is "one hundred ninety-four billion, nine hundred thirty-nine million, seven hundred seventy-one thousand, three hundred sixty-five".