6446889115 has 16 divisors (see below), whose sum is σ = 8032018176. Its totient is φ = 4962268800.

The previous prime is 6446889049. The next prime is 6446889143. The reversal of 6446889115 is 5119886446.

It is a de Polignac number, because none of the positive numbers 2^k-6446889115 is a prime.

It is a super-2 number, since 2×6446889115² = 83124758522210966450, which contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 93396 + ... + 147025.

It is an arithmetic number, because the mean of its divisors is an integer number (502001136).

Almost surely, 2^6446889115 is an apocalyptic number.

6446889115 is a deficient number, since it is larger than the sum of its proper divisors (1585129061).

6446889115 is a wasteful number, since it uses less digits than its factorization.

6446889115 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 240630.

The product of its digits is 1658880, while the sum is 52.

The square root of 6446889115 is about 80292.5221611577. The cubic root of 6446889115 is about 1861.1586717329.

The spelling of 6446889115 in words is "six billion, four hundred forty-six million, eight hundred eighty-nine thousand, one hundred fifteen".