27876506638 has 16 divisors (see below), whose sum is σ = 42120238464. Its totient is φ = 13836782200.

The previous prime is 27876506627. The next prime is 27876506639. The reversal of 27876506638 is 83660567872.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27876506639) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 69063 + ... + 246013.

It is an arithmetic number, because the mean of its divisors is an integer number (2632514904).

Almost surely, 2^27876506638 is an apocalyptic number.

27876506638 is a deficient number, since it is larger than the sum of its proper divisors (14243731826).

27876506638 is a wasteful number, since it uses less digits than its factorization.

27876506638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 177527.

The product of its (nonzero) digits is 20321280, while the sum is 58.

The spelling of 27876506638 in words is "twenty-seven billion, eight hundred seventy-six million, five hundred six thousand, six hundred thirty-eight".