31038081066 has 80 divisors (see below), whose sum is σ = 73274889600. Its totient is φ = 9792643392.

The previous prime is 31038081037. The next prime is 31038081073. The reversal of 31038081066 is 66018083013.

It is a self number, because there is not a number n which added to its sum of digits gives 31038081066.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 3963631 + ... + 3971453.

It is an arithmetic number, because the mean of its divisors is an integer number (915936120).

Almost surely, 2^31038081066 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31038081066, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (36637444800).

31038081066 is an abundant number, since it is smaller than the sum of its proper divisors (42236808534).

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

31038081066 is a wasteful number, since it uses less digits than its factorization.

31038081066 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9145 (or 9136 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 31038081066 in words is "thirty-one billion, thirty-eight million, eighty-one thousand, sixty-six".