25601909997407 has 2 divisors, whose sum is σ = 25601909997408. Its totient is φ = 25601909997406.

The previous prime is 25601909997311. The next prime is 25601909997491. The reversal of 25601909997407 is 70479990910652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25601909997407 - 2⁸ = 25601909997151 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25601909997907) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12800954998703 + 12800954998704.

It is an arithmetic number, because the mean of its divisors is an integer number (12800954998704).

Almost surely, 2^{25601909997407} is an apocalyptic number.

25601909997407 is a deficient number, since it is larger than the sum of its proper divisors (1).

25601909997407 is an equidigital number, since it uses as much as digits as its factorization.

25601909997407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77157360, while the sum is 68.

The spelling of 25601909997407 in words is "twenty-five trillion, six hundred one billion, nine hundred nine million, nine hundred ninety-seven thousand, four hundred seven".