43002556561 has 8 divisors (see below), whose sum is σ = 43570822400. Its totient is φ = 42434889120.

The previous prime is 43002556537. The next prime is 43002556573. The reversal of 43002556561 is 16565520034.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 43002556561 - 2⁷ = 43002556433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43002556561.

It is not an unprimeable number, because it can be changed into a prime (43002556501) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3996 + ... + 293293.

It is an arithmetic number, because the mean of its divisors is an integer number (5446352800).

Almost surely, 2^43002556561 is an apocalyptic number.

It is an amenable number.

43002556561 is a deficient number, since it is larger than the sum of its proper divisors (568265839).

43002556561 is a wasteful number, since it uses less digits than its factorization.

43002556561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 299199.

The product of its (nonzero) digits is 108000, while the sum is 37.

The spelling of 43002556561 in words is "forty-three billion, two million, five hundred fifty-six thousand, five hundred sixty-one".