26551265565 has 32 divisors (see below), whose sum is σ = 46352756736. Its totient is φ = 12870916160.

The previous prime is 26551265501. The next prime is 26551265569. The reversal of 26551265565 is 56556215562.

It is not a de Polignac number, because 26551265565 - 2⁶ = 26551265501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26551265569) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1120672 + ... + 1144118.

It is an arithmetic number, because the mean of its divisors is an integer number (1448523648).

Almost surely, 2^26551265565 is an apocalyptic number.

It is an amenable number.

26551265565 is a deficient number, since it is larger than the sum of its proper divisors (19801491171).

26551265565 is a wasteful number, since it uses less digits than its factorization.

26551265565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30329.

The product of its digits is 2700000, while the sum is 48.

The spelling of 26551265565 in words is "twenty-six billion, five hundred fifty-one million, two hundred sixty-five thousand, five hundred sixty-five".