27897564071 has 16 divisors (see below), whose sum is σ = 31202841600. Its totient is φ = 24776478048.

The previous prime is 27897564059. The next prime is 27897564073. The reversal of 27897564071 is 17046579872.

It is a cyclic number.

It is not a de Polignac number, because 27897564071 - 2³⁴ = 10717694887 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27897563998 and 27897564016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27897564073) 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, 350891 + ... + 422988.

It is an arithmetic number, because the mean of its divisors is an integer number (1950177600).

Almost surely, 2^27897564071 is an apocalyptic number.

27897564071 is a deficient number, since it is larger than the sum of its proper divisors (3305277529).

27897564071 is a wasteful number, since it uses less digits than its factorization.

27897564071 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 773998.

The product of its (nonzero) digits is 5927040, while the sum is 56.

The spelling of 27897564071 in words is "twenty-seven billion, eight hundred ninety-seven million, five hundred sixty-four thousand, seventy-one".