27777640684 has 48 divisors (see below), whose sum is σ = 52453433088. Its totient is φ = 12839606208.

The previous prime is 27777640673. The next prime is 27777640697. The reversal of 27777640684 is 48604677772.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 284179 + ... + 369205.

It is an arithmetic number, because the mean of its divisors is an integer number (1092779856).

Almost surely, 2^27777640684 is an apocalyptic number.

It is an amenable number.

27777640684 is a deficient number, since it is larger than the sum of its proper divisors (24675792404).

27777640684 is a wasteful number, since it uses less digits than its factorization.

27777640684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 85174 (or 85172 counting only the distinct ones).

The product of its (nonzero) digits is 22127616, while the sum is 58.

The spelling of 27777640684 in words is "twenty-seven billion, seven hundred seventy-seven million, six hundred forty thousand, six hundred eighty-four".