27731655801 has 20 divisors (see below), whose sum is σ = 41468562432. Its totient is φ = 18468910008.

The previous prime is 27731655793. The next prime is 27731655803. The reversal of 27731655801 is 10855613772.

It is a happy number.

27731655801 is a `hidden beast` number, since 2 + 7 + 7 + 3 + 1 + 65 + 580 + 1 = 666.

It is not a de Polignac number, because 27731655801 - 2³ = 27731655793 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27731655803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 94521 + ... + 253766.

Almost surely, 2^27731655801 is an apocalyptic number.

It is an amenable number.

27731655801 is a deficient number, since it is larger than the sum of its proper divisors (13736906631).

27731655801 is an equidigital number, since it uses as much as digits as its factorization.

27731655801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 349282 (or 349273 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 45.

The spelling of 27731655801 in words is "twenty-seven billion, seven hundred thirty-one million, six hundred fifty-five thousand, eight hundred one".