27888777775 has 12 divisors (see below), whose sum is σ = 34584237112. Its totient is φ = 22309633440.

The previous prime is 27888777767. The next prime is 27888777803. The reversal of 27888777775 is 57777788872.

It is not a de Polignac number, because 27888777775 - 2³ = 27888777767 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27888777698 and 27888777707.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 608824 + ... + 653026.

Almost surely, 2^27888777775 is an apocalyptic number.

27888777775 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

27888777775 is a deficient number, since it is larger than the sum of its proper divisors (6695459337).

27888777775 is a wasteful number, since it uses less digits than its factorization.

27888777775 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69450 (or 69445 counting only the distinct ones).

The product of its digits is 602362880, while the sum is 73.

The spelling of 27888777775 in words is "twenty-seven billion, eight hundred eighty-eight million, seven hundred seventy-seven thousand, seven hundred seventy-five".