7700252561 has 4 divisors (see below), whose sum is σ = 8153208612. Its totient is φ = 7247296512.

The previous prime is 7700252557. The next prime is 7700252587. The reversal of 7700252561 is 1652520077.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 6412806400 + 1287446161 = 80080^2 + 35881^2 .

It is a cyclic number.

It is not a de Polignac number, because 7700252561 - 2² = 7700252557 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7700252591) 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 3 ways as a sum of consecutive naturals, for example, 226478000 + ... + 226478033.

It is an arithmetic number, because the mean of its divisors is an integer number (2038302153).

Almost surely, 2^7700252561 is an apocalyptic number.

It is an amenable number.

7700252561 is a deficient number, since it is larger than the sum of its proper divisors (452956051).

7700252561 is a wasteful number, since it uses less digits than its factorization.

7700252561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 452956050.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 7700252561 is about 87751.0829619783. The cubic root of 7700252561 is about 1974.7024119055.

The spelling of 7700252561 in words is "seven billion, seven hundred million, two hundred fifty-two thousand, five hundred sixty-one".