27553426645 has 4 divisors (see below), whose sum is σ = 33064111980. Its totient is φ = 22042741312.

The previous prime is 27553426613. The next prime is 27553426697. The reversal of 27553426645 is 54662435572.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5003298756 + 22550127889 = 70734^2 + 150167^2 .

It is a cyclic number.

It is not a de Polignac number, because 27553426645 - 2⁵ = 27553426613 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2755342660 + ... + 2755342669.

It is an arithmetic number, because the mean of its divisors is an integer number (8266027995).

Almost surely, 2^27553426645 is an apocalyptic number.

It is an amenable number.

27553426645 is a deficient number, since it is larger than the sum of its proper divisors (5510685335).

27553426645 is an equidigital number, since it uses as much as digits as its factorization.

27553426645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5510685334.

The product of its digits is 6048000, while the sum is 49.

The spelling of 27553426645 in words is "twenty-seven billion, five hundred fifty-three million, four hundred twenty-six thousand, six hundred forty-five".