25094192857 has 2 divisors, whose sum is σ = 25094192858. Its totient is φ = 25094192856.

The previous prime is 25094192833. The next prime is 25094192909. The reversal of 25094192857 is 75829149052.

It is an a-pointer prime, because the next prime (25094192909) can be obtained adding 25094192857 to its sum of digits (52).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23788743696 + 1305449161 = 154236^2 + 36131^2 .

It is a cyclic number.

It is not a de Polignac number, because 25094192857 - 2¹¹ = 25094190809 is a prime.

It is not a weakly prime, because it can be changed into another prime (25094192807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12547096428 + 12547096429.

It is an arithmetic number, because the mean of its divisors is an integer number (12547096429).

Almost surely, 2^25094192857 is an apocalyptic number.

It is an amenable number.

25094192857 is a deficient number, since it is larger than the sum of its proper divisors (1).

25094192857 is an equidigital number, since it uses as much as digits as its factorization.

25094192857 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1814400, while the sum is 52.

The spelling of 25094192857 in words is "twenty-five billion, ninety-four million, one hundred ninety-two thousand, eight hundred fifty-seven".