31260540066 has 64 divisors (see below), whose sum is σ = 75899566080. Its totient is φ = 8379106560.

The previous prime is 31260540061. The next prime is 31260540119. The reversal of 31260540066 is 66004506213.

It is not an unprimeable number, because it can be changed into a prime (31260540061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151665 + ... + 292443.

It is an arithmetic number, because the mean of its divisors is an integer number (1185930720).

Almost surely, 2^31260540066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31260540066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37949783040).

31260540066 is an abundant number, since it is smaller than the sum of its proper divisors (44639026014).

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

31260540066 is a wasteful number, since it uses less digits than its factorization.

31260540066 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 141119.

The product of its (nonzero) digits is 25920, while the sum is 33.

The spelling of 31260540066 in words is "thirty-one billion, two hundred sixty million, five hundred forty thousand, sixty-six".