194738772123 has 12 divisors (see below), whose sum is σ = 321473528688. Its totient is φ = 111279298320.

The previous prime is 194738772077. The next prime is 194738772133. The reversal of 194738772123 is 321277837491.

194738772123 is a `hidden beast` number, since 1 + 9 + 47 + 387 + 7 + 212 + 3 = 666.

It is not a de Polignac number, because 194738772123 - 2²⁶ = 194671663259 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 194738772123.

It is not an unprimeable number, because it can be changed into a prime (194738772133) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1545545748 + ... + 1545545873.

It is an arithmetic number, because the mean of its divisors is an integer number (26789460724).

Almost surely, 2^194738772123 is an apocalyptic number.

194738772123 is a deficient number, since it is larger than the sum of its proper divisors (126734756565).

194738772123 is a wasteful number, since it uses less digits than its factorization.

194738772123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3091091634 (or 3091091631 counting only the distinct ones).

The product of its digits is 3556224, while the sum is 54.

The spelling of 194738772123 in words is "one hundred ninety-four billion, seven hundred thirty-eight million, seven hundred seventy-two thousand, one hundred twenty-three".