25403843611 has 2 divisors, whose sum is σ = 25403843612. Its totient is φ = 25403843610.

The previous prime is 25403843609. The next prime is 25403843659. The reversal of 25403843611 is 11634830452.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25403843611 - 2¹ = 25403843609 is a prime.

Together with 25403843609, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (25403843681) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12701921805 + 12701921806.

It is an arithmetic number, because the mean of its divisors is an integer number (12701921806).

Almost surely, 2^25403843611 is an apocalyptic number.

25403843611 is a deficient number, since it is larger than the sum of its proper divisors (1).

25403843611 is an equidigital number, since it uses as much as digits as its factorization.

25403843611 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 69120, while the sum is 37.

It can be divided in two parts, 2540 and 3843611, that added together give a triangular number (3846151 = T₂₇₇₃).

The spelling of 25403843611 in words is "twenty-five billion, four hundred three million, eight hundred forty-three thousand, six hundred eleven".