3181461640 has 128 divisors (see below), whose sum is σ = 8468064000. Its totient is φ = 1053093888.

The previous prime is 3181461623. The next prime is 3181461653. The reversal of 3181461640 is 461641813.

It is a junction number, because it is equal to n+sod(n) for n = 3181461596 and 3181461605.

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, 1070076 + ... + 1073044.

It is an arithmetic number, because the mean of its divisors is an integer number (66156750).

Almost surely, 2^3181461640 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 3181461640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4234032000).

3181461640 is an abundant number, since it is smaller than the sum of its proper divisors (5286602360).

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

3181461640 is a wasteful number, since it uses less digits than its factorization.

3181461640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3119 (or 3115 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 3181461640 is about 56404.4469878041. The cubic root of 3181461640 is about 1470.7614239112.

The spelling of 3181461640 in words is "three billion, one hundred eighty-one million, four hundred sixty-one thousand, six hundred forty".