31864145448 has 32 divisors (see below), whose sum is σ = 79668489600. Its totient is φ = 10620298368.

The previous prime is 31864145447. The next prime is 31864145459. The reversal of 31864145448 is 84454146813.

It is a junction number, because it is equal to n+sod(n) for n = 31864145397 and 31864145406.

It is not an unprimeable number, because it can be changed into a prime (31864145447) 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, 192940 + ... + 317732.

It is an arithmetic number, because the mean of its divisors is an integer number (2489640300).

Almost surely, 2^31864145448 is an apocalyptic number.

It is an amenable number.

31864145448 is an abundant number, since it is smaller than the sum of its proper divisors (47804344152).

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

31864145448 is a wasteful number, since it uses less digits than its factorization.

31864145448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135441 (or 135437 counting only the distinct ones).

The product of its digits is 1474560, while the sum is 48.

The spelling of 31864145448 in words is "thirty-one billion, eight hundred sixty-four million, one hundred forty-five thousand, four hundred forty-eight".