25168471973 has 2 divisors, whose sum is σ = 25168471974. Its totient is φ = 25168471972.

The previous prime is 25168471897. The next prime is 25168472027. The reversal of 25168471973 is 37917486152.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 17928674404 + 7239797569 = 133898^2 + 85087^2 .

It is a cyclic number.

It is not a de Polignac number, because 25168471973 - 2³² = 20873504677 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25168471873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12584235986 + 12584235987.

It is an arithmetic number, because the mean of its divisors is an integer number (12584235987).

Almost surely, 2^25168471973 is an apocalyptic number.

It is an amenable number.

25168471973 is a deficient number, since it is larger than the sum of its proper divisors (1).

25168471973 is an equidigital number, since it uses as much as digits as its factorization.

25168471973 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 25168471973 in words is "twenty-five billion, one hundred sixty-eight million, four hundred seventy-one thousand, nine hundred seventy-three".