27680774538 has 16 divisors (see below), whose sum is σ = 55561413600. Its totient is φ = 9193614096.

The previous prime is 27680774531. The next prime is 27680774567. The reversal of 27680774538 is 83547708672.

It is a happy number.

It is a super-3 number, since 3×27680774538³ (a number of 32 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (27680774531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8325888 + ... + 8329211.

It is an arithmetic number, because the mean of its divisors is an integer number (3472588350).

Almost surely, 2^27680774538 is an apocalyptic number.

27680774538 is an abundant number, since it is smaller than the sum of its proper divisors (27880639062).

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

27680774538 is a wasteful number, since it uses less digits than its factorization.

27680774538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16655381.

The product of its (nonzero) digits is 15805440, while the sum is 57.

The spelling of 27680774538 in words is "twenty-seven billion, six hundred eighty million, seven hundred seventy-four thousand, five hundred thirty-eight".