27690208685 has 16 divisors (see below), whose sum is σ = 35274756096. Its totient is φ = 20794637568.

The previous prime is 27690208681. The next prime is 27690208697. The reversal of 27690208685 is 58680209672.

It is a cyclic number.

It is not a de Polignac number, because 27690208685 - 2² = 27690208681 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27690208681) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 392729 + ... + 457838.

It is an arithmetic number, because the mean of its divisors is an integer number (2204672256).

Almost surely, 2^27690208685 is an apocalyptic number.

It is an amenable number.

27690208685 is a deficient number, since it is larger than the sum of its proper divisors (7584547411).

27690208685 is a wasteful number, since it uses less digits than its factorization.

27690208685 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 850972.

The product of its (nonzero) digits is 2903040, while the sum is 53.

The spelling of 27690208685 in words is "twenty-seven billion, six hundred ninety million, two hundred eight thousand, six hundred eighty-five".