31340545866 has 128 divisors (see below), whose sum is σ = 84349440000. Its totient is φ = 8425933632.

The previous prime is 31340545843. The next prime is 31340545883. The reversal of 31340545866 is 66854504313.

31340545866 is a `hidden beast` number, since 3 + 1 + 3 + 40 + 545 + 8 + 66 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1055475 + ... + 1084761.

It is an arithmetic number, because the mean of its divisors is an integer number (658980000).

Almost surely, 2^31340545866 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31340545866, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42174720000).

31340545866 is an abundant number, since it is smaller than the sum of its proper divisors (53008894134).

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

31340545866 is a wasteful number, since it uses less digits than its factorization.

31340545866 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29473 (or 29467 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 45.

The spelling of 31340545866 in words is "thirty-one billion, three hundred forty million, five hundred forty-five thousand, eight hundred sixty-six".