2649854391 has 4 divisors (see below), whose sum is σ = 3533139192. Its totient is φ = 1766569592.

The previous prime is 2649854371. The next prime is 2649854429. The reversal of 2649854391 is 1934589462.

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

It is a cyclic number.

It is not a de Polignac number, because 2649854391 - 2⁵ = 2649854359 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2649854351) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 441642396 + ... + 441642401.

It is an arithmetic number, because the mean of its divisors is an integer number (883284798).

Almost surely, 2^2649854391 is an apocalyptic number.

2649854391 is a deficient number, since it is larger than the sum of its proper divisors (883284801).

2649854391 is an equidigital number, since it uses as much as digits as its factorization.

2649854391 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 883284800.

The product of its digits is 1866240, while the sum is 51.

The square root of 2649854391 is about 51476.7364058756. The cubic root of 2649854391 is about 1383.8021575527.

The spelling of 2649854391 in words is "two billion, six hundred forty-nine million, eight hundred fifty-four thousand, three hundred ninety-one".