2549442065 has 8 divisors (see below), whose sum is σ = 3062198760. Its totient is φ = 2037641472.

The previous prime is 2549442037. The next prime is 2549442083. The reversal of 2549442065 is 5602449452.

It is a Cunningham number, because it is equal to 50492²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 1 + 2549442064 = 1^2 + 50492^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2549442065 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233144 + ... + 243833.

It is an arithmetic number, because the mean of its divisors is an integer number (382774845).

Almost surely, 2^2549442065 is an apocalyptic number.

It is an amenable number.

2549442065 is a deficient number, since it is larger than the sum of its proper divisors (512756695).

2549442065 is a wasteful number, since it uses less digits than its factorization.

2549442065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 478051.

The product of its (nonzero) digits is 345600, while the sum is 41.

The square root of 2549442065 is about 50492.0000099026. Note that the first 5 decimals coincide. The cubic root of 2549442065 is about 1366.0975603559.

The spelling of 2549442065 in words is "two billion, five hundred forty-nine million, four hundred forty-two thousand, sixty-five".