161031262436 has 48 divisors (see below), whose sum is σ = 311257997568. Its totient is φ = 72283754400.

The previous prime is 161031262361. The next prime is 161031262453. The reversal of 161031262436 is 634262130161.

It is a junction number, because it is equal to n+sod(n) for n = 161031262396 and 161031262405.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10228691 + ... + 10244421.

It is an arithmetic number, because the mean of its divisors is an integer number (6484541616).

Almost surely, 2^161031262436 is an apocalyptic number.

It is an amenable number.

161031262436 is a deficient number, since it is larger than the sum of its proper divisors (150226735132).

161031262436 is a wasteful number, since it uses less digits than its factorization.

161031262436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18632 (or 18630 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 35.

Adding to 161031262436 its reverse (634262130161), we get a palindrome (795293392597).

The spelling of 161031262436 in words is "one hundred sixty-one billion, thirty-one million, two hundred sixty-two thousand, four hundred thirty-six".