31406663568 has 40 divisors (see below), whose sum is σ = 92724436288. Its totient is φ = 8973332352.

The previous prime is 31406663543. The next prime is 31406663569. The reversal of 31406663568 is 86536660413.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (31406663569) 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, 46735771 + ... + 46736442.

Almost surely, 2^31406663568 is an apocalyptic number.

It is an amenable number.

31406663568 is an abundant number, since it is smaller than the sum of its proper divisors (61317772720).

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

31406663568 is a wasteful number, since it uses less digits than its factorization.

31406663568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 93472231 (or 93472225 counting only the distinct ones).

The product of its (nonzero) digits is 1866240, while the sum is 48.

The spelling of 31406663568 in words is "thirty-one billion, four hundred six million, six hundred sixty-three thousand, five hundred sixty-eight".