2549664129 has 4 divisors (see below), whose sum is σ = 3399552176. Its totient is φ = 1699776084.

The previous prime is 2549664127. The next prime is 2549664167. The reversal of 2549664129 is 9214669452.

2549664129 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 2549664129 - 2¹ = 2549664127 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2549664121) 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, 424944019 + ... + 424944024.

It is an arithmetic number, because the mean of its divisors is an integer number (849888044).

Almost surely, 2^2549664129 is an apocalyptic number.

It is an amenable number.

2549664129 is a deficient number, since it is larger than the sum of its proper divisors (849888047).

2549664129 is an equidigital number, since it uses as much as digits as its factorization.

2549664129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849888046.

The product of its digits is 933120, while the sum is 48.

The square root of 2549664129 is about 50494.1989638414. The cubic root of 2549664129 is about 1366.1372229269.

The spelling of 2549664129 in words is "two billion, five hundred forty-nine million, six hundred sixty-four thousand, one hundred twenty-nine".