27055421638 has 24 divisors (see below), whose sum is σ = 47245403952. Its totient is φ = 11586227184.

The previous prime is 27055421633. The next prime is 27055421651. The reversal of 27055421638 is 83612455072.

It is a junction number, because it is equal to n+sod(n) for n = 27055421594 and 27055421603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27055421633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 21756 + ... + 233632.

It is an arithmetic number, because the mean of its divisors is an integer number (1968558498).

Almost surely, 2^27055421638 is an apocalyptic number.

27055421638 is a deficient number, since it is larger than the sum of its proper divisors (20189982314).

27055421638 is a wasteful number, since it uses less digits than its factorization.

27055421638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213196 (or 213189 counting only the distinct ones).

The product of its (nonzero) digits is 403200, while the sum is 43.

The spelling of 27055421638 in words is "twenty-seven billion, fifty-five million, four hundred twenty-one thousand, six hundred thirty-eight".