31136366140 has 144 divisors (see below), whose sum is σ = 72803187072. Its totient is φ = 11176704000.

The previous prime is 31136366089. The next prime is 31136366141. The reversal of 31136366140 is 4166363113.

It is a junction number, because it is equal to n+sod(n) for n = 31136366096 and 31136366105.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31136366141) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 114894205 + ... + 114894475.

It is an arithmetic number, because the mean of its divisors is an integer number (505577688).

Almost surely, 2^31136366140 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 31136366140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36401593536).

31136366140 is an abundant number, since it is smaller than the sum of its proper divisors (41666820932).

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

31136366140 is a wasteful number, since it uses less digits than its factorization.

31136366140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 740 (or 727 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The spelling of 31136366140 in words is "thirty-one billion, one hundred thirty-six million, three hundred sixty-six thousand, one hundred forty".