27871893505 has 8 divisors (see below), whose sum is σ = 33753119400. Its totient is φ = 22092950016.

The previous prime is 27871893481. The next prime is 27871893523. The reversal of 27871893505 is 50539817872.

It can be written as a sum of positive squares in 4 ways, for example, as 44315649 + 27827577856 = 6657^2 + 166816^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27871893505 - 2⁷ = 27871893377 is a prime.

It is a super-2 number, since 2×27871893505² (a number of 22 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25570000 + ... + 25571089.

It is an arithmetic number, because the mean of its divisors is an integer number (4219139925).

Almost surely, 2^27871893505 is an apocalyptic number.

It is an amenable number.

27871893505 is a deficient number, since it is larger than the sum of its proper divisors (5881225895).

27871893505 is a wasteful number, since it uses less digits than its factorization.

27871893505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51141203.

The product of its (nonzero) digits is 4233600, while the sum is 55.

The spelling of 27871893505 in words is "twenty-seven billion, eight hundred seventy-one million, eight hundred ninety-three thousand, five hundred five".