2565461623 has 2 divisors, whose sum is σ = 2565461624. Its totient is φ = 2565461622.

The previous prime is 2565461609. The next prime is 2565461651. The reversal of 2565461623 is 3261645652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2565461623 - 2¹³ = 2565453431 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2565461603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1282730811 + 1282730812.

It is an arithmetic number, because the mean of its divisors is an integer number (1282730812).

Almost surely, 2^2565461623 is an apocalyptic number.

2565461623 is a deficient number, since it is larger than the sum of its proper divisors (1).

2565461623 is an equidigital number, since it uses as much as digits as its factorization.

2565461623 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 259200, while the sum is 40.

The square root of 2565461623 is about 50650.3862078069. The cubic root of 2565461623 is about 1368.9529042401.

The spelling of 2565461623 in words is "two billion, five hundred sixty-five million, four hundred sixty-one thousand, six hundred twenty-three".