161044126631111 has 8 divisors (see below), whose sum is σ = 165397368558240. Its totient is φ = 156690921439008.

The previous prime is 161044126631099. The next prime is 161044126631137. The reversal of 161044126631111 is 111136621440161.

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-161044126631111 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 (161044126631161) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179651 + ... + 17947716.

It is an arithmetic number, because the mean of its divisors is an integer number (20674671069780).

Almost surely, 2^{161044126631111} is an apocalyptic number.

161044126631111 is a deficient number, since it is larger than the sum of its proper divisors (4353241927129).

161044126631111 is a wasteful number, since it uses less digits than its factorization.

161044126631111 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18367513.

The product of its (nonzero) digits is 20736, while the sum is 38.

The spelling of 161044126631111 in words is "one hundred sixty-one trillion, forty-four billion, one hundred twenty-six million, six hundred thirty-one thousand, one hundred eleven".