25786581011 has 2 divisors, whose sum is σ = 25786581012. Its totient is φ = 25786581010.

The previous prime is 25786580999. The next prime is 25786581049. The reversal of 25786581011 is 11018568752.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25786581011 is a prime.

It is not a weakly prime, because it can be changed into another prime (25786581061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12893290505 + 12893290506.

It is an arithmetic number, because the mean of its divisors is an integer number (12893290506).

Almost surely, 2^25786581011 is an apocalyptic number.

25786581011 is a deficient number, since it is larger than the sum of its proper divisors (1).

25786581011 is an equidigital number, since it uses as much as digits as its factorization.

25786581011 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 134400, while the sum is 44.

The spelling of 25786581011 in words is "twenty-five billion, seven hundred eighty-six million, five hundred eighty-one thousand, eleven".