2778845634 has 12 divisors (see below), whose sum is σ = 6020832246. Its totient is φ = 926281872.

The previous prime is 2778845609. The next prime is 2778845677. The reversal of 2778845634 is 4365488772.

2778845634 is a `hidden beast` number, since 2 + 7 + 78 + 8 + 4 + 563 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2231145225 + 547700409 = 47235^2 + 23403^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 77190139 + ... + 77190174.

Almost surely, 2^2778845634 is an apocalyptic number.

2778845634 is an abundant number, since it is smaller than the sum of its proper divisors (3241986612).

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

2778845634 is a wasteful number, since it uses less digits than its factorization.

2778845634 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154380321 (or 154380318 counting only the distinct ones).

The product of its digits is 9031680, while the sum is 54.

The square root of 2778845634 is about 52714.7572696679. The cubic root of 2778845634 is about 1405.9012187224.

The spelling of 2778845634 in words is "two billion, seven hundred seventy-eight million, eight hundred forty-five thousand, six hundred thirty-four".