161362161731 has 8 divisors (see below), whose sum is σ = 161904875520. Its totient is φ = 160820306568.

The previous prime is 161362161689. The next prime is 161362161757. The reversal of 161362161731 is 137161263161.

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-161362161731 is a prime.

It is a super-2 number, since 2×161362161731² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161367161731) 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, 162950 + ... + 590996.

It is an arithmetic number, because the mean of its divisors is an integer number (20238109440).

Almost surely, 2^161362161731 is an apocalyptic number.

161362161731 is a deficient number, since it is larger than the sum of its proper divisors (542713789).

161362161731 is an equidigital number, since it uses as much as digits as its factorization.

161362161731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 429313.

The product of its digits is 27216, while the sum is 38.

The spelling of 161362161731 in words is "one hundred sixty-one billion, three hundred sixty-two million, one hundred sixty-one thousand, seven hundred thirty-one".