30861344778 has 32 divisors (see below), whose sum is σ = 67526827200. Its totient is φ = 9325119360.

The previous prime is 30861344747. The next prime is 30861344831. The reversal of 30861344778 is 87744316803.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 30861344778.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 646875 + ... + 692942.

It is an arithmetic number, because the mean of its divisors is an integer number (2110213350).

Almost surely, 2^30861344778 is an apocalyptic number.

30861344778 is an abundant number, since it is smaller than the sum of its proper divisors (36665482422).

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

30861344778 is a wasteful number, since it uses less digits than its factorization.

30861344778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340182.

The product of its (nonzero) digits is 2709504, while the sum is 51.

The spelling of 30861344778 in words is "thirty billion, eight hundred sixty-one million, three hundred forty-four thousand, seven hundred seventy-eight".