5634780661 has 2 divisors, whose sum is σ = 5634780662. Its totient is φ = 5634780660.

The previous prime is 5634780659. The next prime is 5634780691. The reversal of 5634780661 is 1660874365.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4901400100 + 733380561 = 70010^2 + 27081^2 .

It is a cyclic number.

It is not a de Polignac number, because 5634780661 - 2¹ = 5634780659 is a prime.

Together with 5634780659, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (5634780691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2817390330 + 2817390331.

It is an arithmetic number, because the mean of its divisors is an integer number (2817390331).

Almost surely, 2^5634780661 is an apocalyptic number.

It is an amenable number.

5634780661 is a deficient number, since it is larger than the sum of its proper divisors (1).

5634780661 is an equidigital number, since it uses as much as digits as its factorization.

5634780661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 46.

The square root of 5634780661 is about 75065.1760871844. The cubic root of 5634780661 is about 1779.4768336878.

The spelling of 5634780661 in words is "five billion, six hundred thirty-four million, seven hundred eighty thousand, six hundred sixty-one".