6401756673 has 30 divisors (see below), whose sum is σ = 10355351094. Its totient is φ = 3939534144.

The previous prime is 6401756671. The next prime is 6401756689. The reversal of 6401756673 is 3766571046.

6401756673 is a `hidden beast` number, since 6 + 4 + 0 + 17 + 566 + 73 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 859251969 + 5542504704 = 29313^2 + 74448^2 .

It is not a de Polignac number, because 6401756673 - 2¹ = 6401756671 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (6401756671) by changing a digit.

It is a polite number, since it can be written in 29 ways as a sum of consecutive naturals, for example, 220140 + ... + 247517.

Almost surely, 2^6401756673 is an apocalyptic number.

It is an amenable number.

6401756673 is a deficient number, since it is larger than the sum of its proper divisors (3953594421).

6401756673 is a wasteful number, since it uses less digits than its factorization.

6401756673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 467695 (or 467673 counting only the distinct ones).

The product of its (nonzero) digits is 635040, while the sum is 45.

The square root of 6401756673 is about 80010.9784529598. The cubic root of 6401756673 is about 1856.8053877760.

The spelling of 6401756673 in words is "six billion, four hundred one million, seven hundred fifty-six thousand, six hundred seventy-three".