2549643863 has 8 divisors (see below), whose sum is σ = 2865151968. Its totient is φ = 2251190304.

The previous prime is 2549643847. The next prime is 2549643871. The reversal of 2549643863 is 3683469452.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2549643863 - 2⁴ = 2549643847 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549643823) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4263320 + ... + 4263917.

It is an arithmetic number, because the mean of its divisors is an integer number (358143996).

Almost surely, 2^2549643863 is an apocalyptic number.

2549643863 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2549643863 is a deficient number, since it is larger than the sum of its proper divisors (315508105).

2549643863 is a wasteful number, since it uses less digits than its factorization.

2549643863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8527273.

The product of its digits is 3732480, while the sum is 50.

The square root of 2549643863 is about 50493.9982869252. The cubic root of 2549643863 is about 1366.1336033377.

The spelling of 2549643863 in words is "two billion, five hundred forty-nine million, six hundred forty-three thousand, eight hundred sixty-three".