6431390480 has 40 divisors (see below), whose sum is σ = 15085331352. Its totient is φ = 2549786624.

The previous prime is 6431390477. The next prime is 6431390507. The reversal of 6431390480 is 840931346.

It can be written as a sum of positive squares in 4 ways, for example, as 97140736 + 6334249744 = 9856^2 + 79588^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 346679 + ... + 364758.

Almost surely, 2^6431390480 is an apocalyptic number.

It is an amenable number.

6431390480 is an abundant number, since it is smaller than the sum of its proper divisors (8653940872).

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

6431390480 is a wasteful number, since it uses less digits than its factorization.

6431390480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 711563 (or 711557 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 38.

The square root of 6431390480 is about 80195.9505212077. The cubic root of 6431390480 is about 1859.6660363135. Note that the first 3 decimals are identical.

The spelling of 6431390480 in words is "six billion, four hundred thirty-one million, three hundred ninety thousand, four hundred eighty".