161061731135673 has 64 divisors (see below), whose sum is σ = 240422573721600. Its totient is φ = 95310032624640.

The previous prime is 161061731135659. The next prime is 161061731135677. The reversal of 161061731135673 is 376531137160161.

It is a happy number.

It is not a de Polignac number, because 161061731135673 - 2¹² = 161061731131577 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (161061731135677) 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 63 ways as a sum of consecutive naturals, for example, 2086496508 + ... + 2086573698.

It is an arithmetic number, because the mean of its divisors is an integer number (3756602714400).

Almost surely, 2^{161061731135673} is an apocalyptic number.

It is an amenable number.

161061731135673 is a deficient number, since it is larger than the sum of its proper divisors (79360842585927).

161061731135673 is a wasteful number, since it uses less digits than its factorization.

161061731135673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86862.

The product of its (nonzero) digits is 1428840, while the sum is 51.

The spelling of 161061731135673 in words is "one hundred sixty-one trillion, sixty-one billion, seven hundred thirty-one million, one hundred thirty-five thousand, six hundred seventy-three".