26165420655 has 64 divisors (see below), whose sum is σ = 47750971392. Its totient is φ = 12110567040.

The previous prime is 26165420653. The next prime is 26165420669. The reversal of 26165420655 is 55602456162.

It is a happy number.

It is not a de Polignac number, because 26165420655 - 2¹ = 26165420653 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (26165420651) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1978194 + ... + 1991376.

It is an arithmetic number, because the mean of its divisors is an integer number (746108928).

Almost surely, 2^26165420655 is an apocalyptic number.

26165420655 is a deficient number, since it is larger than the sum of its proper divisors (21585550737).

26165420655 is a wasteful number, since it uses less digits than its factorization.

26165420655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13748.

The product of its (nonzero) digits is 432000, while the sum is 42.

The spelling of 26165420655 in words is "twenty-six billion, one hundred sixty-five million, four hundred twenty thousand, six hundred fifty-five".