25247938811 has 2 divisors, whose sum is σ = 25247938812. Its totient is φ = 25247938810.

The previous prime is 25247938783. The next prime is 25247938823. The reversal of 25247938811 is 11883974252.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25247938811 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 25247938811.

It is not a weakly prime, because it can be changed into another prime (25247938861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12623969405 + 12623969406.

It is an arithmetic number, because the mean of its divisors is an integer number (12623969406).

Almost surely, 2^25247938811 is an apocalyptic number.

25247938811 is a deficient number, since it is larger than the sum of its proper divisors (1).

25247938811 is an equidigital number, since it uses as much as digits as its factorization.

25247938811 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 967680, while the sum is 50.

The spelling of 25247938811 in words is "twenty-five billion, two hundred forty-seven million, nine hundred thirty-eight thousand, eight hundred eleven".