27790646706 has 12 divisors (see below), whose sum is σ = 60213067902. Its totient is φ = 9263548896.

The previous prime is 27790646659. The next prime is 27790646707. The reversal of 27790646706 is 60764609772.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 23268756681 + 4521890025 = 152541^2 + 67245^2 .

It is not an unprimeable number, because it can be changed into a prime (27790646707) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 771962391 + ... + 771962426.

Almost surely, 2^27790646706 is an apocalyptic number.

27790646706 is an abundant number, since it is smaller than the sum of its proper divisors (32422421196).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27790646706 is a wasteful number, since it uses less digits than its factorization.

27790646706 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1543924825 (or 1543924822 counting only the distinct ones).

The product of its (nonzero) digits is 5334336, while the sum is 54.

The spelling of 27790646706 in words is "twenty-seven billion, seven hundred ninety million, six hundred forty-six thousand, seven hundred six".