6556400043 has 8 divisors (see below), whose sum is σ = 8742304656. Its totient is φ = 4370714400.

The previous prime is 6556400021. The next prime is 6556400051. The reversal of 6556400043 is 3400046556.

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

It is not a de Polignac number, because 6556400043 - 2¹² = 6556395947 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6556399977 and 6556400013.

It is not an unprimeable number, because it can be changed into a prime (6556400003) 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, 37173 + ... + 120393.

It is an arithmetic number, because the mean of its divisors is an integer number (1092788082).

Almost surely, 2^6556400043 is an apocalyptic number.

6556400043 is a deficient number, since it is larger than the sum of its proper divisors (2185904613).

6556400043 is a wasteful number, since it uses less digits than its factorization.

6556400043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109485.

The product of its (nonzero) digits is 43200, while the sum is 33.

The square root of 6556400043 is about 80971.6002250172. The cubic root of 6556400043 is about 1871.6378306350.

Adding to 6556400043 its reverse (3400046556), we get a palindrome (9956446599).

The spelling of 6556400043 in words is "six billion, five hundred fifty-six million, four hundred thousand, forty-three".