194136126431 has 8 divisors (see below), whose sum is σ = 221367891024. Its totient is φ = 168661249920.

The previous prime is 194136126403. The next prime is 194136126449. The reversal of 194136126431 is 134621631491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-194136126431 is a prime.

It is a super-2 number, since 2×194136126431² (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 (194136126451) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 439221785 + ... + 439222226.

It is an arithmetic number, because the mean of its divisors is an integer number (27670986378).

Almost surely, 2^194136126431 is an apocalyptic number.

194136126431 is a deficient number, since it is larger than the sum of its proper divisors (27231764593).

194136126431 is a wasteful number, since it uses less digits than its factorization.

194136126431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 878444041.

The product of its digits is 93312, while the sum is 41.

The spelling of 194136126431 in words is "one hundred ninety-four billion, one hundred thirty-six million, one hundred twenty-six thousand, four hundred thirty-one".