27775277775 has 72 divisors (see below), whose sum is σ = 59848014720. Its totient is φ = 12028979520.

The previous prime is 27775277767. The next prime is 27775277801. The reversal of 27775277775 is 57777257772.

It is not a de Polignac number, because 27775277775 - 2³ = 27775277767 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 434157 + ... + 494006.

Almost surely, 2^27775277775 is an apocalyptic number.

27775277775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27775277775 is an abundant number, since it is smaller than the sum of its proper divisors (32072736945).

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

27775277775 is a wasteful number, since it uses less digits than its factorization.

27775277775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928205 (or 928197 counting only the distinct ones).

The product of its digits is 82354300, while the sum is 63.

The spelling of 27775277775 in words is "twenty-seven billion, seven hundred seventy-five million, two hundred seventy-seven thousand, seven hundred seventy-five".