26240643045 has 24 divisors (see below), whose sum is σ = 45527892696. Its totient is φ = 13981436928.

The previous prime is 26240643031. The next prime is 26240643083. The reversal of 26240643045 is 54034604262.

26240643045 is a `hidden beast` number, since 2 + 6 + 2 + 4 + 0 + 643 + 0 + 4 + 5 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 13800140676 + 12440502369 = 117474^2 + 111537^2 .

It is not a de Polignac number, because 26240643045 - 2¹³ = 26240634853 is a prime.

It is a congruent number.

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, 235764 + ... + 328733.

It is an arithmetic number, because the mean of its divisors is an integer number (1896995529).

Almost surely, 2^26240643045 is an apocalyptic number.

It is an amenable number.

26240643045 is a deficient number, since it is larger than the sum of its proper divisors (19287249651).

26240643045 is a wasteful number, since it uses less digits than its factorization.

26240643045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 565541 (or 565538 counting only the distinct ones).

The product of its (nonzero) digits is 138240, while the sum is 36.

The spelling of 26240643045 in words is "twenty-six billion, two hundred forty million, six hundred forty-three thousand, forty-five".