6430373640 has 48 divisors (see below), whose sum is σ = 20898715500. Its totient is φ = 1714766208.

The previous prime is 6430373627. The next prime is 6430373687. The reversal of 6430373640 is 463730346.

6430373640 is a `hidden beast` number, since 6 + 4 + 3 + 0 + 3 + 7 + 3 + 640 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6186451716 + 243921924 = 78654^2 + 15618^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 6430373595 and 6430373604.

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 11 ways as a sum of consecutive naturals, for example, 8930715 + ... + 8931434.

Almost surely, 2^6430373640 is an apocalyptic number.

6430373640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6430373640 is an abundant number, since it is smaller than the sum of its proper divisors (14468341860).

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

6430373640 is a wasteful number, since it uses less digits than its factorization.

6430373640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17862166 (or 17862159 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 36.

The square root of 6430373640 is about 80189.6105489982. The cubic root of 6430373640 is about 1859.5680231655.

The spelling of 6430373640 in words is "six billion, four hundred thirty million, three hundred seventy-three thousand, six hundred forty".