31013117660 has 96 divisors (see below), whose sum is σ = 78604065792. Its totient is φ = 10048135680.

The previous prime is 31013117657. The next prime is 31013117677. The reversal of 31013117660 is 6671131013.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209240 + ... + 325280.

It is an arithmetic number, because the mean of its divisors is an integer number (818792352).

Almost surely, 2^31013117660 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31013117660, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (39302032896).

31013117660 is an abundant number, since it is smaller than the sum of its proper divisors (47590948132).

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

31013117660 is a wasteful number, since it uses less digits than its factorization.

31013117660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116163 (or 116161 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

Adding to 31013117660 its reverse (6671131013), we get a palindrome (37684248673).

The spelling of 31013117660 in words is "thirty-one billion, thirteen million, one hundred seventeen thousand, six hundred sixty".