27777780505553 has 8 divisors (see below), whose sum is σ = 30879517783296. Its totient is φ = 24813898218000.

The previous prime is 27777780505499. The next prime is 27777780505591. The reversal of 27777780505553 is 35550508777772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27777780505553 - 2¹⁶ = 27777780440017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27777780508553) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34463747123 + ... + 34463747928.

It is an arithmetic number, because the mean of its divisors is an integer number (3859939722912).

Almost surely, 2^{27777780505553} is an apocalyptic number.

It is an amenable number.

27777780505553 is a deficient number, since it is larger than the sum of its proper divisors (3101737277743).

27777780505553 is a wasteful number, since it uses less digits than its factorization.

27777780505553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68927495095.

The product of its (nonzero) digits is 504210000, while the sum is 68.

The spelling of 27777780505553 in words is "twenty-seven trillion, seven hundred seventy-seven billion, seven hundred eighty million, five hundred five thousand, five hundred fifty-three".