31863307444 has 6 divisors (see below), whose sum is σ = 55760788034. Its totient is φ = 15931653720.

The previous prime is 31863307351. The next prime is 31863307447. The reversal of 31863307444 is 44470336813.

It can be written as a sum of positive squares in only one way, i.e., 31516900900 + 346406544 = 177530^2 + 18612^2 .

It is a super-2 number, since 2×31863307444² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31863307444.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31863307447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3982913427 + ... + 3982913434.

Almost surely, 2^31863307444 is an apocalyptic number.

It is an amenable number.

31863307444 is a deficient number, since it is larger than the sum of its proper divisors (23897480590).

31863307444 is a wasteful number, since it uses less digits than its factorization.

31863307444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7965826865 (or 7965826863 counting only the distinct ones).

The product of its (nonzero) digits is 580608, while the sum is 43.

The spelling of 31863307444 in words is "thirty-one billion, eight hundred sixty-three million, three hundred seven thousand, four hundred forty-four".