27622641538 has 16 divisors (see below), whose sum is σ = 41486584824. Its totient is φ = 13793794560.

The previous prime is 27622641533. The next prime is 27622641547. The reversal of 27622641538 is 83514622672.

It can be written as a sum of positive squares in 4 ways, for example, as 26058676329 + 1563965209 = 161427^2 + 39547^2 .

It is not an unprimeable number, because it can be changed into a prime (27622641533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9022528 + ... + 9025588.

Almost surely, 2^27622641538 is an apocalyptic number.

27622641538 is a deficient number, since it is larger than the sum of its proper divisors (13863943286).

27622641538 is a wasteful number, since it uses less digits than its factorization.

27622641538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7317.

The product of its digits is 967680, while the sum is 46.

The spelling of 27622641538 in words is "twenty-seven billion, six hundred twenty-two million, six hundred forty-one thousand, five hundred thirty-eight".