12900043440 has 60 divisors (see below), whose sum is σ = 43322648304. Its totient is φ = 3440011392.

The previous prime is 12900043427. The next prime is 12900043447. The reversal of 12900043440 is 4434000921.

It is a tau number, because it is divible by the number of its divisors (60).

It is a super-4 number, since 4×12900043440⁴ (a number of 42 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (12900043447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8957644 + ... + 8959083.

Almost surely, 2^12900043440 is an apocalyptic number.

12900043440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

12900043440 is an abundant number, since it is smaller than the sum of its proper divisors (30422604864).

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

12900043440 is a wasteful number, since it uses less digits than its factorization.

12900043440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17916746 (or 17916737 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 27.

The spelling of 12900043440 in words is "twelve billion, nine hundred million, forty-three thousand, four hundred forty".