27777467755 has 4 divisors (see below), whose sum is σ = 33332961312. Its totient is φ = 22221974200.

The previous prime is 27777467749. The next prime is 27777467771. The reversal of 27777467755 is 55776477772.

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

It is not a de Polignac number, because 27777467755 - 2²¹ = 27775370603 is a prime.

It is a Duffinian 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, 2777746771 + ... + 2777746780.

It is an arithmetic number, because the mean of its divisors is an integer number (8333240328).

Almost surely, 2^27777467755 is an apocalyptic number.

27777467755 is a deficient number, since it is larger than the sum of its proper divisors (5555493557).

27777467755 is an equidigital number, since it uses as much as digits as its factorization.

27777467755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5555493556.

The product of its digits is 141178800, while the sum is 64.

The spelling of 27777467755 in words is "twenty-seven billion, seven hundred seventy-seven million, four hundred sixty-seven thousand, seven hundred fifty-five".