27378613506 has 32 divisors (see below), whose sum is σ = 56058900480. Its totient is φ = 8909473104.

The previous prime is 27378613487. The next prime is 27378613513. The reversal of 27378613506 is 60531687372.

It is a super-2 number, since 2×27378613506² (a number of 22 digits) contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

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, 506535 + ... + 557973.

It is an arithmetic number, because the mean of its divisors is an integer number (1751840640).

Almost surely, 2^27378613506 is an apocalyptic number.

27378613506 is an abundant number, since it is smaller than the sum of its proper divisors (28680286974).

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

27378613506 is a wasteful number, since it uses less digits than its factorization.

27378613506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53550.

The product of its (nonzero) digits is 1270080, while the sum is 48.

The spelling of 27378613506 in words is "twenty-seven billion, three hundred seventy-eight million, six hundred thirteen thousand, five hundred six".