161012423631 has 8 divisors (see below), whose sum is σ = 222086101680. Its totient is φ = 103640180672.

The previous prime is 161012423599. The next prime is 161012423683. The reversal of 161012423631 is 136324210161.

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

It is a cyclic number.

It is not a de Polignac number, because 161012423631 - 2⁵ = 161012423599 is a prime.

It is a super-2 number, since 2×161012423631² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161012423431) 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, 925358670 + ... + 925358843.

It is an arithmetic number, because the mean of its divisors is an integer number (27760762710).

Almost surely, 2^161012423631 is an apocalyptic number.

161012423631 is a deficient number, since it is larger than the sum of its proper divisors (61073678049).

161012423631 is a wasteful number, since it uses less digits than its factorization.

161012423631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1850717545.

The product of its (nonzero) digits is 5184, while the sum is 30.

Adding to 161012423631 its reverse (136324210161), we get a palindrome (297336633792).

The spelling of 161012423631 in words is "one hundred sixty-one billion, twelve million, four hundred twenty-three thousand, six hundred thirty-one".