6581780043 has 8 divisors (see below), whose sum is σ = 8776844688. Its totient is φ = 4387284384.

The previous prime is 6581780003. The next prime is 6581780069. The reversal of 6581780043 is 3400871856.

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

It is not a de Polignac number, because 6581780043 - 2¹⁶ = 6581714507 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 6581779977 and 6581780004.

It is not an unprimeable number, because it can be changed into a prime (6581780003) 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, 114480 + ... + 162077.

It is an arithmetic number, because the mean of its divisors is an integer number (1097105586).

Almost surely, 2^6581780043 is an apocalyptic number.

6581780043 is a deficient number, since it is larger than the sum of its proper divisors (2195064645).

6581780043 is a wasteful number, since it uses less digits than its factorization.

6581780043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 284493.

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 6581780043 is about 81128.1704650117. The cubic root of 6581780043 is about 1874.0497744483.

The spelling of 6581780043 in words is "six billion, five hundred eighty-one million, seven hundred eighty thousand, forty-three".