25397521703 has 2 divisors, whose sum is σ = 25397521704. Its totient is φ = 25397521702.

The previous prime is 25397521693. The next prime is 25397521717. The reversal of 25397521703 is 30712579352.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 25397521703 - 2¹⁰ = 25397520679 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25397521753) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12698760851 + 12698760852.

It is an arithmetic number, because the mean of its divisors is an integer number (12698760852).

Almost surely, 2^25397521703 is an apocalyptic number.

25397521703 is a deficient number, since it is larger than the sum of its proper divisors (1).

25397521703 is an equidigital number, since it uses as much as digits as its factorization.

25397521703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 396900, while the sum is 44.

The spelling of 25397521703 in words is "twenty-five billion, three hundred ninety-seven million, five hundred twenty-one thousand, seven hundred three".