31140091488 has 144 divisors (see below), whose sum is σ = 91546540848. Its totient is φ = 9258163200.

The previous prime is 31140091481. The next prime is 31140091519. The reversal of 31140091488 is 88419004113.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31140091481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 590358 + ... + 640938.

It is an arithmetic number, because the mean of its divisors is an integer number (635739867).

Almost surely, 2^31140091488 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 31140091488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45773270424).

31140091488 is an abundant number, since it is smaller than the sum of its proper divisors (60406449360).

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

31140091488 is a wasteful number, since it uses less digits than its factorization.

31140091488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50669 (or 50650 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 39.

The spelling of 31140091488 in words is "thirty-one billion, one hundred forty million, ninety-one thousand, four hundred eighty-eight".