27189638010 has 32 divisors (see below), whose sum is σ = 72505702080. Its totient is φ = 7250570064.

The previous prime is 27189637987. The next prime is 27189638011. The reversal of 27189638010 is 1083698172.

27189638010 is a `hidden beast` number, since 2 + 7 + 1 + 8 + 9 + 638 + 0 + 1 + 0 = 666.

It is a super-2 number, since 2×27189638010² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (27189638011) 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, 50350912 + ... + 50351451.

It is an arithmetic number, because the mean of its divisors is an integer number (2265803190).

Almost surely, 2^27189638010 is an apocalyptic number.

27189638010 is an abundant number, since it is smaller than the sum of its proper divisors (45316064070).

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

27189638010 is a wasteful number, since it uses less digits than its factorization.

27189638010 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100702379 (or 100702373 counting only the distinct ones).

The product of its (nonzero) digits is 145152, while the sum is 45.

The spelling of 27189638010 in words is "twenty-seven billion, one hundred eighty-nine million, six hundred thirty-eight thousand, ten".