2549889899 has 4 divisors (see below), whose sum is σ = 2550054600. Its totient is φ = 2549725200.

The previous prime is 2549889893. The next prime is 2549889913. The reversal of 2549889899 is 9989889452.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2549889899 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549889893) 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, 56402 + ... + 90999.

It is an arithmetic number, because the mean of its divisors is an integer number (637513650).

Almost surely, 2^2549889899 is an apocalyptic number.

2549889899 is a deficient number, since it is larger than the sum of its proper divisors (164701).

2549889899 is a wasteful number, since it uses less digits than its factorization.

2549889899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164700.

The product of its digits is 134369280, while the sum is 71.

The square root of 2549889899 is about 50496.4345176964. The cubic root of 2549889899 is about 1366.1775450611.

The spelling of 2549889899 in words is "two billion, five hundred forty-nine million, eight hundred eighty-nine thousand, eight hundred ninety-nine".