27780877863 has 12 divisors (see below), whose sum is σ = 40131262080. Its totient is φ = 18519049536.

The previous prime is 27780877841. The next prime is 27780877877. The reversal of 27780877863 is 36877808772.

It is not a de Polignac number, because 27780877863 - 2¹⁸ = 27780615719 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27780877863.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27780877363) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7431 + ... + 235832.

It is an arithmetic number, because the mean of its divisors is an integer number (3344271840).

Almost surely, 2^27780877863 is an apocalyptic number.

27780877863 is a deficient number, since it is larger than the sum of its proper divisors (12350384217).

27780877863 is a wasteful number, since it uses less digits than its factorization.

27780877863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 255958 (or 255955 counting only the distinct ones).

The product of its (nonzero) digits is 44255232, while the sum is 63.

The spelling of 27780877863 in words is "twenty-seven billion, seven hundred eighty million, eight hundred seventy-seven thousand, eight hundred sixty-three".