27072811997 has 32 divisors (see below), whose sum is σ = 34802279424. Its totient is φ = 20447481600.

The previous prime is 27072811951. The next prime is 27072811999. The reversal of 27072811997 is 79911827072.

It is a happy number.

It is not a de Polignac number, because 27072811997 - 2¹² = 27072807901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27072811999) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 402533 + ... + 464949.

It is an arithmetic number, because the mean of its divisors is an integer number (1087571232).

Almost surely, 2^27072811997 is an apocalyptic number.

It is an amenable number.

27072811997 is a deficient number, since it is larger than the sum of its proper divisors (7729467427).

27072811997 is a wasteful number, since it uses less digits than its factorization.

27072811997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62609.

The product of its (nonzero) digits is 889056, while the sum is 53.

The spelling of 27072811997 in words is "twenty-seven billion, seventy-two million, eight hundred eleven thousand, nine hundred ninety-seven".