2549985578 has 12 divisors (see below), whose sum is σ = 4449464802. Its totient is φ = 1092850920.

The previous prime is 2549985479. The next prime is 2549985593. The reversal of 2549985578 is 8755899452.

It can be written as a sum of positive squares in only one way, i.e., 2532404329 + 17581249 = 50323^2 + 4193^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2549985578.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13010033 + ... + 13010228.

Almost surely, 2^2549985578 is an apocalyptic number.

2549985578 is a deficient number, since it is larger than the sum of its proper divisors (1899479224).

2549985578 is a wasteful number, since it uses less digits than its factorization.

2549985578 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26020277 (or 26020270 counting only the distinct ones).

The product of its digits is 36288000, while the sum is 62.

The square root of 2549985578 is about 50497.3818925298. The cubic root of 2549985578 is about 1366.1946324481.

The spelling of 2549985578 in words is "two billion, five hundred forty-nine million, nine hundred eighty-five thousand, five hundred seventy-eight".