30778904133 has 24 divisors (see below), whose sum is σ = 44673047640. Its totient is φ = 20420305920.

The previous prime is 30778904113. The next prime is 30778904159. The reversal of 30778904133 is 33140987703.

It can be written as a sum of positive squares in 4 ways, for example, as 189943524 + 30588960609 = 13782^2 + 174897^2 .

It is not a de Polignac number, because 30778904133 - 2¹⁰ = 30778903109 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30778904113) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6517213 + ... + 6521933.

It is an arithmetic number, because the mean of its divisors is an integer number (1861376985).

Almost surely, 2^30778904133 is an apocalyptic number.

It is an amenable number.

30778904133 is a deficient number, since it is larger than the sum of its proper divisors (13894143507).

30778904133 is a wasteful number, since it uses less digits than its factorization.

30778904133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8069 (or 8066 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 45.

The spelling of 30778904133 in words is "thirty billion, seven hundred seventy-eight million, nine hundred four thousand, one hundred thirty-three".