2549805965 has 8 divisors (see below), whose sum is σ = 3496876800. Its totient is φ = 1748438352.

The previous prime is 2549805961. The next prime is 2549805971. The reversal of 2549805965 is 5695089452.

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 2549805965 - 2² = 2549805961 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2549805961) 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, 36425765 + ... + 36425834.

It is an arithmetic number, because the mean of its divisors is an integer number (437109600).

Almost surely, 2^2549805965 is an apocalyptic number.

It is an amenable number.

2549805965 is a deficient number, since it is larger than the sum of its proper divisors (947070835).

2549805965 is an equidigital number, since it uses as much as digits as its factorization.

2549805965 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72851611.

The product of its (nonzero) digits is 3888000, while the sum is 53.

The square root of 2549805965 is about 50495.6034224763. The cubic root of 2549805965 is about 1366.1625548709.

The spelling of 2549805965 in words is "two billion, five hundred forty-nine million, eight hundred five thousand, nine hundred sixty-five".