27696780818 has 16 divisors (see below), whose sum is σ = 47496542784. Its totient is φ = 11865962160.

The previous prime is 27696780781. The next prime is 27696780821. The reversal of 27696780818 is 81808769672.

It is a super-2 number, since 2×27696780818² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298268 + ... + 379943.

It is an arithmetic number, because the mean of its divisors is an integer number (2968533924).

Almost surely, 2^27696780818 is an apocalyptic number.

27696780818 is a deficient number, since it is larger than the sum of its proper divisors (19799761966).

27696780818 is a wasteful number, since it uses less digits than its factorization.

27696780818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 681137.

The product of its (nonzero) digits is 16257024, while the sum is 62.

The spelling of 27696780818 in words is "twenty-seven billion, six hundred ninety-six million, seven hundred eighty thousand, eight hundred eighteen".