27938563680402 has 12 divisors (see below), whose sum is σ = 60533554640910. Its totient is φ = 9312854560128.

The previous prime is 27938563680343. The next prime is 27938563680413. The reversal of 27938563680402 is 20408636583972.

It is a happy number.

27938563680402 is a `hidden beast` number, since 2 + 7 + 9 + 3 + 8 + 563 + 68 + 0 + 4 + 0 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 27914621998041 + 23941682361 = 5283429^2 + 154731^2 .

It is a Smith number, since the sum of its digits (63) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 27938563680402.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 776071213327 + ... + 776071213362.

Almost surely, 2^{27938563680402} is an apocalyptic number.

27938563680402 is an abundant number, since it is smaller than the sum of its proper divisors (32594990960508).

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

27938563680402 is a wasteful number, since it uses less digits than its factorization.

27938563680402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552142426697 (or 1552142426694 counting only the distinct ones).

The product of its (nonzero) digits is 104509440, while the sum is 63.

The spelling of 27938563680402 in words is "twenty-seven trillion, nine hundred thirty-eight billion, five hundred sixty-three million, six hundred eighty thousand, four hundred two".