26056501065 has 64 divisors (see below), whose sum is σ = 53408908800. Its totient is φ = 11806083072.

The previous prime is 26056501039. The next prime is 26056501099. The reversal of 26056501065 is 56010565062.

It is a happy number.

26056501065 is a `hidden beast` number, since 26 + 0 + 565 + 0 + 10 + 65 = 666.

It is not a de Polignac number, because 26056501065 - 2⁸ = 26056500809 is a prime.

It is a super-2 number, since 2×26056501065² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 15220 + ... + 228789.

It is an arithmetic number, because the mean of its divisors is an integer number (834514200).

Almost surely, 2^26056501065 is an apocalyptic number.

It is an amenable number.

26056501065 is an abundant number, since it is smaller than the sum of its proper divisors (27352407735).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

26056501065 is a wasteful number, since it uses less digits than its factorization.

26056501065 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 244143 (or 244137 counting only the distinct ones).

The product of its (nonzero) digits is 54000, while the sum is 36.

The spelling of 26056501065 in words is "twenty-six billion, fifty-six million, five hundred one thousand, sixty-five".