27729777755 has 16 divisors (see below), whose sum is σ = 34030627200. Its totient is φ = 21686121600.

The previous prime is 27729777743. The next prime is 27729777767. The reversal of 27729777755 is 55777792772.

It is an interprime number because it is at equal distance from previous prime (27729777743) and next prime (27729777767).

It is not a de Polignac number, because 27729777755 - 2⁸ = 27729777499 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 27729777691 and 27729777700.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 307640 + ... + 387429.

It is an arithmetic number, because the mean of its divisors is an integer number (2126914200).

Almost surely, 2^27729777755 is an apocalyptic number.

27729777755 is a deficient number, since it is larger than the sum of its proper divisors (6300849445).

27729777755 is a wasteful number, since it uses less digits than its factorization.

27729777755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 695254.

The product of its digits is 105884100, while the sum is 65.

The spelling of 27729777755 in words is "twenty-seven billion, seven hundred twenty-nine million, seven hundred seventy-seven thousand, seven hundred fifty-five".