31850538040 has 16 divisors (see below), whose sum is σ = 71663710680. Its totient is φ = 12740215200.

The previous prime is 31850538019. The next prime is 31850538053. The reversal of 31850538040 is 4083505813.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 398131686 + ... + 398131765.

Almost surely, 2^31850538040 is an apocalyptic number.

It is an amenable number.

31850538040 is an abundant number, since it is smaller than the sum of its proper divisors (39813172640).

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

31850538040 is a wasteful number, since it uses less digits than its factorization.

31850538040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796263462 (or 796263458 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 37.

The spelling of 31850538040 in words is "thirty-one billion, eight hundred fifty million, five hundred thirty-eight thousand, forty".