7725611749 has 6 divisors (see below), whose sum is σ = 8076112646. Its totient is φ = 7389715080.

The previous prime is 7725611741. The next prime is 7725611771. The reversal of 7725611749 is 9471165277.

It can be written as a sum of positive squares in only one way, i.e., 5883657025 + 1841954724 = 76705^2 + 42918^2 .

It is not a de Polignac number, because 7725611749 - 2³ = 7725611741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725611741) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7301562 + ... + 7302619.

Almost surely, 2^7725611749 is an apocalyptic number.

It is an amenable number.

7725611749 is a deficient number, since it is larger than the sum of its proper divisors (350500897).

7725611749 is a wasteful number, since it uses less digits than its factorization.

7725611749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14604227 (or 14604204 counting only the distinct ones).

The product of its digits is 740880, while the sum is 49.

The square root of 7725611749 is about 87895.4592058088. The cubic root of 7725611749 is about 1976.8677944514.

The spelling of 7725611749 in words is "seven billion, seven hundred twenty-five million, six hundred eleven thousand, seven hundred forty-nine".