6451750440 has 80 divisors (see below), whose sum is σ = 21685060980. Its totient is φ = 1720465920.

The previous prime is 6451750429. The next prime is 6451750463. The reversal of 6451750440 is 440571546.

6451750440 is a `hidden beast` number, since 6 + 45 + 175 + 0 + 440 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 6436211076 + 15539364 = 80226^2 + 3942^2 .

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 = 6451750395 and 6451750404.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 992401 + ... + 998880.

Almost surely, 2^6451750440 is an apocalyptic number.

6451750440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6451750440 is an abundant number, since it is smaller than the sum of its proper divisors (15233310540).

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

6451750440 is a wasteful number, since it uses less digits than its factorization.

6451750440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1991304 (or 1991291 counting only the distinct ones).

The product of its (nonzero) digits is 67200, while the sum is 36.

The square root of 6451750440 is about 80322.7890452019. The cubic root of 6451750440 is about 1861.6263610742.

The spelling of 6451750440 in words is "six billion, four hundred fifty-one million, seven hundred fifty thousand, four hundred forty".