25956659077 has 4 divisors (see below), whose sum is σ = 26016883776. Its totient is φ = 25896434380.

The previous prime is 25956659063. The next prime is 25956659081. The reversal of 25956659077 is 77095665952.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 25956659077 - 2¹¹ = 25956657029 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25956659977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 30111703 + ... + 30112564.

It is an arithmetic number, because the mean of its divisors is an integer number (6504220944).

Almost surely, 2^25956659077 is an apocalyptic number.

It is an amenable number.

25956659077 is a deficient number, since it is larger than the sum of its proper divisors (60224699).

25956659077 is an equidigital number, since it uses as much as digits as its factorization.

25956659077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60224698.

The product of its (nonzero) digits is 35721000, while the sum is 61.

The spelling of 25956659077 in words is "twenty-five billion, nine hundred fifty-six million, six hundred fifty-nine thousand, seventy-seven".