194779753231 has 16 divisors (see below), whose sum is σ = 235711550016. Its totient is φ = 157125459456.

The previous prime is 194779753213. The next prime is 194779753261. The reversal of 194779753231 is 132357977491.

It is not a de Polignac number, because 194779753231 - 2¹¹ = 194779751183 is a prime.

It is a super-2 number, since 2×194779753231² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194779753261) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4466625 + ... + 4510021.

It is an arithmetic number, because the mean of its divisors is an integer number (14731971876).

Almost surely, 2^194779753231 is an apocalyptic number.

194779753231 is a deficient number, since it is larger than the sum of its proper divisors (40931796785).

194779753231 is a wasteful number, since it uses less digits than its factorization.

194779753231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81138.

The product of its digits is 10001880, while the sum is 58.

The spelling of 194779753231 in words is "one hundred ninety-four billion, seven hundred seventy-nine million, seven hundred fifty-three thousand, two hundred thirty-one".