25619564011 has 2 divisors, whose sum is σ = 25619564012. Its totient is φ = 25619564010.

The previous prime is 25619563997. The next prime is 25619564027. The reversal of 25619564011 is 11046591652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25619564011 - 2⁵ = 25619563979 is a prime.

It is a super-2 number, since 2×25619564011² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (25619567011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12809782005 + 12809782006.

It is an arithmetic number, because the mean of its divisors is an integer number (12809782006).

Almost surely, 2^25619564011 is an apocalyptic number.

25619564011 is a deficient number, since it is larger than the sum of its proper divisors (1).

25619564011 is an equidigital number, since it uses as much as digits as its factorization.

25619564011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 64800, while the sum is 40.

The spelling of 25619564011 in words is "twenty-five billion, six hundred nineteen million, five hundred sixty-four thousand, eleven".