31663541144 has 8 divisors (see below), whose sum is σ = 59369139660. Its totient is φ = 15831770568.

The previous prime is 31663541137. The next prime is 31663541153. The reversal of 31663541144 is 44114536613.

It is a tau number, because it is divible by the number of its divisors (8).

It is a junction number, because it is equal to n+sod(n) for n = 31663541098 and 31663541107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1978971314 + ... + 1978971329.

Almost surely, 2^31663541144 is an apocalyptic number.

It is an amenable number.

31663541144 is a deficient number, since it is larger than the sum of its proper divisors (27705598516).

31663541144 is a wasteful number, since it uses less digits than its factorization.

31663541144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3957942649 (or 3957942645 counting only the distinct ones).

The product of its digits is 103680, while the sum is 38.

The spelling of 31663541144 in words is "thirty-one billion, six hundred sixty-three million, five hundred forty-one thousand, one hundred forty-four".