27675717021 has 24 divisors (see below), whose sum is σ = 41124680064. Its totient is φ = 17926067520.

The previous prime is 27675716963. The next prime is 27675717029. The reversal of 27675717021 is 12071757672.

27675717021 is a `hidden beast` number, since 2 + 7 + 6 + 7 + 571 + 70 + 2 + 1 = 666.

It is a de Polignac number, because none of the positive numbers 2^k-27675717021 is a prime.

It is a super-2 number, since 2×27675717021² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27675717029) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 180835 + ... + 296736.

It is an arithmetic number, because the mean of its divisors is an integer number (1713528336).

Almost surely, 2^27675717021 is an apocalyptic number.

It is an amenable number.

27675717021 is a deficient number, since it is larger than the sum of its proper divisors (13448963043).

27675717021 is a wasteful number, since it uses less digits than its factorization.

27675717021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477761 (or 477758 counting only the distinct ones).

The product of its (nonzero) digits is 288120, while the sum is 45.

The spelling of 27675717021 in words is "twenty-seven billion, six hundred seventy-five million, seven hundred seventeen thousand, twenty-one".