2549688864 has 24 divisors (see below), whose sum is σ = 6692933520. Its totient is φ = 849896256.

The previous prime is 2549688863. The next prime is 2549688887. The reversal of 2549688864 is 4688869452.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×2549688864² = 13001826606411220992, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2549688798 and 2549688807.

It is not an unprimeable number, because it can be changed into a prime (2549688863) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13279534 + ... + 13279725.

It is an arithmetic number, because the mean of its divisors is an integer number (278872230).

Almost surely, 2^2549688864 is an apocalyptic number.

2549688864 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2549688864 is an abundant number, since it is smaller than the sum of its proper divisors (4143244656).

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

2549688864 is a wasteful number, since it uses less digits than its factorization.

2549688864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26559272 (or 26559264 counting only the distinct ones).

The product of its digits is 26542080, while the sum is 60.

The square root of 2549688864 is about 50494.4438923730. The cubic root of 2549688864 is about 1366.1416406715.

It can be divided in two parts, 2549688 and 864, that added together give a palindrome (2550552).

The spelling of 2549688864 in words is "two billion, five hundred forty-nine million, six hundred eighty-eight thousand, eight hundred sixty-four".