25777720607 has 2 divisors, whose sum is σ = 25777720608. Its totient is φ = 25777720606.

The previous prime is 25777720559. The next prime is 25777720637. The reversal of 25777720607 is 70602777752.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 25777720607 - 2³² = 21482753311 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (25777720637) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 12888860303 + 12888860304.

It is an arithmetic number, because the mean of its divisors is an integer number (12888860304).

Almost surely, 2^25777720607 is an apocalyptic number.

25777720607 is a deficient number, since it is larger than the sum of its proper divisors (1).

25777720607 is an equidigital number, since it uses as much as digits as its factorization.

25777720607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016840, while the sum is 50.

The spelling of 25777720607 in words is "twenty-five billion, seven hundred seventy-seven million, seven hundred twenty thousand, six hundred seven".