6491775400 has 48 divisors (see below), whose sum is σ = 16465508640. Its totient is φ = 2360644800.

The previous prime is 6491775373. The next prime is 6491775421. The reversal of 6491775400 is 45771946.

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 11 ways as a sum of consecutive naturals, for example, 1473204 + ... + 1477603.

It is an arithmetic number, because the mean of its divisors is an integer number (343031430).

Almost surely, 2^6491775400 is an apocalyptic number.

It is an amenable number.

6491775400 is an abundant number, since it is smaller than the sum of its proper divisors (9973733240).

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

6491775400 is a wasteful number, since it uses less digits than its factorization.

6491775400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2950834 (or 2950825 counting only the distinct ones).

The product of its (nonzero) digits is 211680, while the sum is 43.

The square root of 6491775400 is about 80571.5545338428. The cubic root of 6491775400 is about 1865.4681074298.

The spelling of 6491775400 in words is "six billion, four hundred ninety-one million, seven hundred seventy-five thousand, four hundred".