49665242449 has 3 divisors (see below), whose sum is σ = 49665465307. Its totient is φ = 49665019592.

The previous prime is 49665242401. The next prime is 49665242461. The reversal of 49665242449 is 94424256694.

It is a happy number.

The square root of 49665242449 is 222857.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 24754302225 + 24910940224 = 157335^2 + 157832^2 .

It is not a de Polignac number, because 49665242449 - 2¹⁵ = 49665209681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 49665242449.

It is not an unprimeable number, because it can be changed into a prime (49665242479) by changing a digit.

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 2 ways as a sum of consecutive naturals, for example, 111429 + ... + 334285.

Almost surely, 2^49665242449 is an apocalyptic number.

49665242449 is the 222857-th square number.

49665242449 is the 111429-th centered octagonal number.

It is an amenable number.

49665242449 is a deficient number, since it is larger than the sum of its proper divisors (222858).

49665242449 is an frugal number, since it uses more digits than its factorization.

49665242449 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 445714 (or 222857 counting only the distinct ones).

The product of its digits is 14929920, while the sum is 55.

The spelling of 49665242449 in words is "forty-nine billion, six hundred sixty-five million, two hundred forty-two thousand, four hundred forty-nine".