2520656591 has 2 divisors, whose sum is σ = 2520656592. Its totient is φ = 2520656590.

The previous prime is 2520656573. The next prime is 2520656609. The reversal of 2520656591 is 1956560252.

It is a balanced prime because it is at equal distance from previous prime (2520656573) and next prime (2520656609).

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2520656591 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2520656291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1260328295 + 1260328296.

It is an arithmetic number, because the mean of its divisors is an integer number (1260328296).

Almost surely, 2^2520656591 is an apocalyptic number.

2520656591 is a deficient number, since it is larger than the sum of its proper divisors (1).

2520656591 is an equidigital number, since it uses as much as digits as its factorization.

2520656591 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 41.

The square root of 2520656591 is about 50206.1409690090. The cubic root of 2520656591 is about 1360.9366009075.

The spelling of 2520656591 in words is "two billion, five hundred twenty million, six hundred fifty-six thousand, five hundred ninety-one".