26320525565 has 16 divisors (see below), whose sum is σ = 31966811136. Its totient is φ = 20802835200.

The previous prime is 26320525537. The next prime is 26320525619. The reversal of 26320525565 is 56552502362.

It is a happy number.

It is not a de Polignac number, because 26320525565 - 2⁶ = 26320525501 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100820 + ... + 250610.

It is an arithmetic number, because the mean of its divisors is an integer number (1997925696).

Almost surely, 2^26320525565 is an apocalyptic number.

It is an amenable number.

26320525565 is a deficient number, since it is larger than the sum of its proper divisors (5646285571).

26320525565 is a wasteful number, since it uses less digits than its factorization.

26320525565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150220.

The product of its (nonzero) digits is 540000, while the sum is 41.

The spelling of 26320525565 in words is "twenty-six billion, three hundred twenty million, five hundred twenty-five thousand, five hundred sixty-five".