30810851968 has 64 divisors (see below), whose sum is σ = 66164152320. Its totient is φ = 14207155200.

The previous prime is 30810851941. The next prime is 30810851971. The reversal of 30810851968 is 86915801803.

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, 1907221 + ... + 1923307.

It is an arithmetic number, because the mean of its divisors is an integer number (1033814880).

Almost surely, 2^30810851968 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 30810851968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33082076160).

30810851968 is an abundant number, since it is smaller than the sum of its proper divisors (35353300352).

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

30810851968 is a wasteful number, since it uses less digits than its factorization.

30810851968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17265 (or 17253 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 49.

The spelling of 30810851968 in words is "thirty billion, eight hundred ten million, eight hundred fifty-one thousand, nine hundred sixty-eight".