25000657901 has 2 divisors, whose sum is σ = 25000657902. Its totient is φ = 25000657900.

The previous prime is 25000657873. The next prime is 25000657933. The reversal of 25000657901 is 10975600052.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 22582575625 + 2418082276 = 150275^2 + 49174^2 .

It is a cyclic number.

It is not a de Polignac number, because 25000657901 - 2⁶ = 25000657837 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25000657951) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12500328950 + 12500328951.

It is an arithmetic number, because the mean of its divisors is an integer number (12500328951).

Almost surely, 2^25000657901 is an apocalyptic number.

It is an amenable number.

25000657901 is a deficient number, since it is larger than the sum of its proper divisors (1).

25000657901 is an equidigital number, since it uses as much as digits as its factorization.

25000657901 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18900, while the sum is 35.

The spelling of 25000657901 in words is "twenty-five billion, six hundred fifty-seven thousand, nine hundred one".