26220045645 has 24 divisors (see below), whose sum is σ = 47015256600. Its totient is φ = 13501815936.

The previous prime is 26220045637. The next prime is 26220045697. The reversal of 26220045645 is 54654002262.

26220045645 is a `hidden beast` number, since 2 + 6 + 2 + 2 + 0 + 0 + 4 + 5 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 792872964 + 25427172681 = 28158^2 + 159459^2 .

It is not a de Polignac number, because 26220045645 - 2³ = 26220045637 is a prime.

It is a super-3 number, since 3×26220045645³ (a number of 32 digits) contains 333 as substring.

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, 10044690 + ... + 10047299.

It is an arithmetic number, because the mean of its divisors is an integer number (1958969025).

Almost surely, 2^26220045645 is an apocalyptic number.

It is an amenable number.

26220045645 is a deficient number, since it is larger than the sum of its proper divisors (20795210955).

26220045645 is a wasteful number, since it uses less digits than its factorization.

26220045645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20092029 (or 20092026 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 36.

The spelling of 26220045645 in words is "twenty-six billion, two hundred twenty million, forty-five thousand, six hundred forty-five".