31645423356 has 24 divisors (see below), whose sum is σ = 77049727104. Its totient is φ = 10089845040.

The previous prime is 31645423349. The next prime is 31645423387. The reversal of 31645423356 is 65332454613.

It is a congruent number.

It is an unprimeable number.

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, 57328390 + ... + 57328941.

It is an arithmetic number, because the mean of its divisors is an integer number (3210405296).

Almost surely, 2^31645423356 is an apocalyptic number.

It is an amenable number.

31645423356 is an abundant number, since it is smaller than the sum of its proper divisors (45404303748).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31645423356 is a wasteful number, since it uses less digits than its factorization.

31645423356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 114657361 (or 114657359 counting only the distinct ones).

The product of its digits is 777600, while the sum is 42.

Adding to 31645423356 its reverse (65332454613), we get a palindrome (96977877969).

The spelling of 31645423356 in words is "thirty-one billion, six hundred forty-five million, four hundred twenty-three thousand, three hundred fifty-six".