27491322768 has 80 divisors (see below), whose sum is σ = 87408322176. Its totient is φ = 7250457600.

The previous prime is 27491322743. The next prime is 27491322773. The reversal of 27491322768 is 86722319472.

It is a Smith number, since the sum of its digits (51) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 27491322768.

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, 3142533 + ... + 3151268.

Almost surely, 2^27491322768 is an apocalyptic number.

27491322768 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

27491322768 is an abundant number, since it is smaller than the sum of its proper divisors (59916999408).

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

27491322768 is a wasteful number, since it uses less digits than its factorization.

27491322768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6293832 (or 6293826 counting only the distinct ones).

The product of its digits is 2032128, while the sum is 51.

The spelling of 27491322768 in words is "twenty-seven billion, four hundred ninety-one million, three hundred twenty-two thousand, seven hundred sixty-eight".