26624415561 has 16 divisors (see below), whose sum is σ = 35850475584. Its totient is φ = 17574308864.

The previous prime is 26624415523. The next prime is 26624415607. The reversal of 26624415561 is 16551442662.

It is a cyclic number.

It is not a de Polignac number, because 26624415561 - 2¹⁵ = 26624382793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (26624415511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 291010 + ... + 371396.

It is an arithmetic number, because the mean of its divisors is an integer number (2240654724).

Almost surely, 2^26624415561 is an apocalyptic number.

It is an amenable number.

26624415561 is a deficient number, since it is larger than the sum of its proper divisors (9226060023).

26624415561 is a wasteful number, since it uses less digits than its factorization.

26624415561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81480.

The product of its digits is 345600, while the sum is 42.

The spelling of 26624415561 in words is "twenty-six billion, six hundred twenty-four million, four hundred fifteen thousand, five hundred sixty-one".