26386718545 has 16 divisors (see below), whose sum is σ = 34794759168. Its totient is φ = 19050259840.

The previous prime is 26386718537. The next prime is 26386718549. The reversal of 26386718545 is 54581768362.

It is a happy number.

It is not a de Polignac number, because 26386718545 - 2³ = 26386718537 is a prime.

It is a super-5 number, since 5×26386718545⁵ (a number of 53 digits) contains 55555 as substring.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (26386718549) 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, 1743409 + ... + 1758478.

It is an arithmetic number, because the mean of its divisors is an integer number (2174672448).

Almost surely, 2^26386718545 is an apocalyptic number.

It is an amenable number.

26386718545 is a deficient number, since it is larger than the sum of its proper divisors (8408040623).

26386718545 is a wasteful number, since it uses less digits than its factorization.

26386718545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3502040.

The product of its digits is 9676800, while the sum is 55.

The spelling of 26386718545 in words is "twenty-six billion, three hundred eighty-six million, seven hundred eighteen thousand, five hundred forty-five".