27245780388 has 36 divisors (see below), whose sum is σ = 72922531500. Its totient is φ = 8547695616.

The previous prime is 27245780383. The next prime is 27245780399. The reversal of 27245780388 is 88308754272.

It can be written as a sum of positive squares in 2 ways, for example, as 22674938724 + 4570841664 = 150582^2 + 67608^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a super-2 number, since 2×27245780388² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (27245780383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22259013 + ... + 22260236.

It is an arithmetic number, because the mean of its divisors is an integer number (2025625875).

Almost surely, 2^27245780388 is an apocalyptic number.

It is an amenable number.

27245780388 is an abundant number, since it is smaller than the sum of its proper divisors (45676751112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27245780388 is a wasteful number, since it uses less digits than its factorization.

27245780388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44519276 (or 44519271 counting only the distinct ones).

The product of its (nonzero) digits is 6021120, while the sum is 54.

The spelling of 27245780388 in words is "twenty-seven billion, two hundred forty-five million, seven hundred eighty thousand, three hundred eighty-eight".