31289161144 has 8 divisors (see below), whose sum is σ = 58667177160. Its totient is φ = 15644580568.

The previous prime is 31289161133. The next prime is 31289161159. The reversal of 31289161144 is 44116198213.

It is a happy number.

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 = 31289161097 and 31289161106.

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, 1955572564 + ... + 1955572579.

It is an arithmetic number, because the mean of its divisors is an integer number (7333397145).

Almost surely, 2^31289161144 is an apocalyptic number.

It is an amenable number.

31289161144 is a deficient number, since it is larger than the sum of its proper divisors (27378016016).

31289161144 is a wasteful number, since it uses less digits than its factorization.

31289161144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3911145149 (or 3911145145 counting only the distinct ones).

The product of its digits is 41472, while the sum is 40.

The spelling of 31289161144 in words is "thirty-one billion, two hundred eighty-nine million, one hundred sixty-one thousand, one hundred forty-four".