31585190016 has 64 divisors (see below), whose sum is σ = 84053793600. Its totient is φ = 10508866560.

The previous prime is 31585189991. The next prime is 31585190023. The reversal of 31585190016 is 61009158513.

It is a tau number, because it is divible by the number of its divisors (64).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 131725 + ... + 283763.

It is an arithmetic number, because the mean of its divisors is an integer number (1313340525).

Almost surely, 2^31585190016 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 31585190016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42026896800).

31585190016 is an abundant number, since it is smaller than the sum of its proper divisors (52468603584).

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

31585190016 is a wasteful number, since it uses less digits than its factorization.

31585190016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152597 (or 152585 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The spelling of 31585190016 in words is "thirty-one billion, five hundred eighty-five million, one hundred ninety thousand, sixteen".