12747747738555 has 24 divisors (see below), whose sum is σ = 22151753783952. Its totient is φ = 6781673346624.

The previous prime is 12747747738547. The next prime is 12747747738601. The reversal of 12747747738555 is 55583774774721.

12747747738555 is a `hidden beast` number, since 1 + 2 + 7 + 4 + 77 + 477 + 3 + 85 + 5 + 5 = 666.

It is not a de Polignac number, because 12747747738555 - 2³ = 12747747738547 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 356762089 + ... + 356797818.

It is an arithmetic number, because the mean of its divisors is an integer number (922989740998).

Almost surely, 2^{12747747738555} is an apocalyptic number.

12747747738555 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

12747747738555 is a deficient number, since it is larger than the sum of its proper divisors (9404006045397).

12747747738555 is a wasteful number, since it uses less digits than its factorization.

12747747738555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 713560315 (or 713560312 counting only the distinct ones).

The product of its digits is 1613472000, while the sum is 72.

The spelling of 12747747738555 in words is "twelve trillion, seven hundred forty-seven billion, seven hundred forty-seven million, seven hundred thirty-eight thousand, five hundred fifty-five".