27747685438 has 32 divisors (see below), whose sum is σ = 47515507200. Its totient is φ = 12029566560.

The previous prime is 27747685411. The next prime is 27747685439. The reversal of 27747685438 is 83458674772.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27747685439) 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, 98031 + ... + 255157.

It is an arithmetic number, because the mean of its divisors is an integer number (1484859600).

Almost surely, 2^27747685438 is an apocalyptic number.

27747685438 is a deficient number, since it is larger than the sum of its proper divisors (19767821762).

27747685438 is a wasteful number, since it uses less digits than its factorization.

27747685438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157512.

The product of its digits is 63221760, while the sum is 61.

The spelling of 27747685438 in words is "twenty-seven billion, seven hundred forty-seven million, six hundred eighty-five thousand, four hundred thirty-eight".