6871443945 has 64 divisors (see below), whose sum is σ = 11958865920. Its totient is φ = 3355900928.

The previous prime is 6871443919. The next prime is 6871443949. The reversal of 6871443945 is 5493441786.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 6871443945 - 2⁹ = 6871443433 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (6871443949) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2143714 + ... + 2146916.

It is an arithmetic number, because the mean of its divisors is an integer number (186857280).

Almost surely, 2^6871443945 is an apocalyptic number.

It is an amenable number.

6871443945 is a deficient number, since it is larger than the sum of its proper divisors (5087421975).

6871443945 is a wasteful number, since it uses less digits than its factorization.

6871443945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3454.

The product of its digits is 2903040, while the sum is 51.

The square root of 6871443945 is about 82894.1731667552. The cubic root of 6871443945 is about 1901.1483312186.

The spelling of 6871443945 in words is "six billion, eight hundred seventy-one million, four hundred forty-three thousand, nine hundred forty-five".