27071638542 has 48 divisors (see below), whose sum is σ = 66882881520. Its totient is φ = 7839749376.

The previous prime is 27071638541. The next prime is 27071638567. The reversal of 27071638542 is 24583617072.

27071638542 is a `hidden beast` number, since 2 + 7 + 0 + 7 + 1 + 638 + 5 + 4 + 2 = 666.

It is a super-2 number, since 2×27071638542² (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 (27071638541) 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, 3398692 + ... + 3406647.

It is an arithmetic number, because the mean of its divisors is an integer number (1393393365).

Almost surely, 2^27071638542 is an apocalyptic number.

27071638542 is an abundant number, since it is smaller than the sum of its proper divisors (39811242978).

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

27071638542 is a wasteful number, since it uses less digits than its factorization.

27071638542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6805377 (or 6805374 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 45.

The spelling of 27071638542 in words is "twenty-seven billion, seventy-one million, six hundred thirty-eight thousand, five hundred forty-two".