31481064141688 has 128 divisors (see below), whose sum is σ = 69214116280320. Its totient is φ = 13144583462400.

The previous prime is 31481064141649. The next prime is 31481064141697. The reversal of 31481064141688 is 88614146018413.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1301019606 + ... + 1301043802.

It is an arithmetic number, because the mean of its divisors is an integer number (540735283440).

Almost surely, 2^{31481064141688} 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 31481064141688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (34607058140160).

31481064141688 is an abundant number, since it is smaller than the sum of its proper divisors (37733052138632).

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

31481064141688 is a wasteful number, since it uses less digits than its factorization.

31481064141688 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27317 (or 27313 counting only the distinct ones).

The product of its (nonzero) digits is 3538944, while the sum is 55.

The spelling of 31481064141688 in words is "thirty-one trillion, four hundred eighty-one billion, sixty-four million, one hundred forty-one thousand, six hundred eighty-eight".