12578661432 has 48 divisors (see below), whose sum is σ = 35166156480. Its totient is φ = 4057632000.

The previous prime is 12578661397. The next prime is 12578661449. The reversal of 12578661432 is 23416687521.

12578661432 is a `hidden beast` number, since 1 + 2 + 578 + 66 + 14 + 3 + 2 = 666.

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 11 ways as a sum of consecutive naturals, for example, 2815569 + ... + 2820032.

It is an arithmetic number, because the mean of its divisors is an integer number (732628260).

Almost surely, 2^12578661432 is an apocalyptic number.

12578661432 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

12578661432 is an abundant number, since it is smaller than the sum of its proper divisors (22587495048).

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

12578661432 is a wasteful number, since it uses less digits than its factorization.

12578661432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5635644 (or 5635637 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 12578661432 in words is "twelve billion, five hundred seventy-eight million, six hundred sixty-one thousand, four hundred thirty-two".