12705551544 has 32 divisors (see below), whose sum is σ = 36301576320. Its totient is φ = 3630157536.

The previous prime is 12705551497. The next prime is 12705551597. The reversal of 12705551544 is 44515550721.

It is a super-2 number, since 2×12705551544² (a number of 21 digits) contains 22 as substring.

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, 37813974 + ... + 37814309.

It is an arithmetic number, because the mean of its divisors is an integer number (1134424260).

Almost surely, 2^12705551544 is an apocalyptic number.

12705551544 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

12705551544 is an abundant number, since it is smaller than the sum of its proper divisors (23596024776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12705551544 is a wasteful number, since it uses less digits than its factorization.

12705551544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75628299 (or 75628295 counting only the distinct ones).

The product of its (nonzero) digits is 140000, while the sum is 39.

The spelling of 12705551544 in words is "twelve billion, seven hundred five million, five hundred fifty-one thousand, five hundred forty-four".