27499999998 has 32 divisors (see below), whose sum is σ = 56917107360. Its totient is φ = 8847377280.

The previous prime is 27499999993. The next prime is 27500000009. The reversal of 27499999998 is 89999999472.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 27499999998.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27499999993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480468 + ... + 534648.

It is an arithmetic number, because the mean of its divisors is an integer number (1778659605).

Almost surely, 2^27499999998 is an apocalyptic number.

27499999998 is an abundant number, since it is smaller than the sum of its proper divisors (29417107362).

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

27499999998 is a wasteful number, since it uses less digits than its factorization.

27499999998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57132.

The product of its digits is 2142770112, while the sum is 84.

The spelling of 27499999998 in words is "twenty-seven billion, four hundred ninety-nine million, nine hundred ninety-nine thousand, nine hundred ninety-eight".