31445654412 has 12 divisors (see below), whose sum is σ = 73373193656. Its totient is φ = 10481884800.

The previous prime is 31445654407. The next prime is 31445654431. The reversal of 31445654412 is 21445654413.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1310235589 + ... + 1310235612.

Almost surely, 2^31445654412 is an apocalyptic number.

It is an amenable number.

31445654412 is an abundant number, since it is smaller than the sum of its proper divisors (41927539244).

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

31445654412 is a wasteful number, since it uses less digits than its factorization.

31445654412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2620471208 (or 2620471206 counting only the distinct ones).

The product of its digits is 230400, while the sum is 39.

Subtracting from 31445654412 its reverse (21445654413), we obtain a palindrome (9999999999).

The spelling of 31445654412 in words is "thirty-one billion, four hundred forty-five million, six hundred fifty-four thousand, four hundred twelve".