26619385545 has 24 divisors (see below), whose sum is σ = 46144183176. Its totient is φ = 14195801088.

The previous prime is 26619385537. The next prime is 26619385571. The reversal of 26619385545 is 54558391662.

26619385545 is a `hidden beast` number, since 2 + 6 + 6 + 1 + 93 + 8 + 5 + 545 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 10203626169 + 16415759376 = 101013^2 + 128124^2 .

It is not a de Polignac number, because 26619385545 - 2³ = 26619385537 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 26619385491 and 26619385500.

It is an unprimeable number.

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 23 ways as a sum of consecutive naturals, for example, 835447 + ... + 866723.

It is an arithmetic number, because the mean of its divisors is an integer number (1922674299).

Almost surely, 2^26619385545 is an apocalyptic number.

It is an amenable number.

26619385545 is a deficient number, since it is larger than the sum of its proper divisors (19524797631).

26619385545 is a wasteful number, since it uses less digits than its factorization.

26619385545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50201 (or 50198 counting only the distinct ones).

The product of its digits is 7776000, while the sum is 54.

It can be divided in two parts, 26619 and 385545, that added together give a square (412164 = 642²).

The spelling of 26619385545 in words is "twenty-six billion, six hundred nineteen million, three hundred eighty-five thousand, five hundred forty-five".