25640670703 has 2 divisors, whose sum is σ = 25640670704. Its totient is φ = 25640670702.

The previous prime is 25640670689. The next prime is 25640670709. The reversal of 25640670703 is 30707604652.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-25640670703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25640670709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12820335351 + 12820335352.

It is an arithmetic number, because the mean of its divisors is an integer number (12820335352).

Almost surely, 2^25640670703 is an apocalyptic number.

25640670703 is a deficient number, since it is larger than the sum of its proper divisors (1).

25640670703 is an equidigital number, since it uses as much as digits as its factorization.

25640670703 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 211680, while the sum is 40.

The spelling of 25640670703 in words is "twenty-five billion, six hundred forty million, six hundred seventy thousand, seven hundred three".