12777542213638 has 16 divisors (see below), whose sum is σ = 20294028157824. Its totient is φ = 6012876703360.

The previous prime is 12777542213627. The next prime is 12777542213699. The reversal of 12777542213638 is 83631224577721.

It is a happy number.

It is a congruent 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 7 ways as a sum of consecutive naturals, for example, 141673 + ... + 5057188.

It is an arithmetic number, because the mean of its divisors is an integer number (1268376759864).

Almost surely, 2^{12777542213638} is an apocalyptic number.

12777542213638 is a deficient number, since it is larger than the sum of its proper divisors (7516485944186).

12777542213638 is a wasteful number, since it uses less digits than its factorization.

12777542213638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5271167.

The product of its digits is 23708160, while the sum is 58.

The spelling of 12777542213638 in words is "twelve trillion, seven hundred seventy-seven billion, five hundred forty-two million, two hundred thirteen thousand, six hundred thirty-eight".