27878126004 has 36 divisors (see below), whose sum is σ = 70475799940. Its totient is φ = 9291905280.

The previous prime is 27878125967. The next prime is 27878126021. The reversal of 27878126004 is 40062187872.

27878126004 is a `hidden beast` number, since 27 + 8 + 7 + 8 + 12 + 600 + 4 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4316490000 + 23561636004 = 65700^2 + 153498^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 509244 + ... + 561324.

Almost surely, 2^27878126004 is an apocalyptic number.

It is an amenable number.

27878126004 is an abundant number, since it is smaller than the sum of its proper divisors (42597673936).

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

27878126004 is a wasteful number, since it uses less digits than its factorization.

27878126004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66960 (or 66955 counting only the distinct ones).

The product of its (nonzero) digits is 301056, while the sum is 45.

The spelling of 27878126004 in words is "twenty-seven billion, eight hundred seventy-eight million, one hundred twenty-six thousand, four".