6431449880 has 16 divisors (see below), whose sum is σ = 14470762320. Its totient is φ = 2572579936.

The previous prime is 6431449861. The next prime is 6431449891. The reversal of 6431449880 is 889441346.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 80393084 + ... + 80393163.

It is an arithmetic number, because the mean of its divisors is an integer number (904422645).

Almost surely, 2^6431449880 is an apocalyptic number.

It is an amenable number.

6431449880 is an abundant number, since it is smaller than the sum of its proper divisors (8039312440).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6431449880 is a wasteful number, since it uses less digits than its factorization.

6431449880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160786258 (or 160786254 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 47.

The square root of 6431449880 is about 80196.3208632416. The cubic root of 6431449880 is about 1859.6717615566.

The spelling of 6431449880 in words is "six billion, four hundred thirty-one million, four hundred forty-nine thousand, eight hundred eighty".