6481775617 has 4 divisors (see below), whose sum is σ = 6481998000. Its totient is φ = 6481553236.

The previous prime is 6481775611. The next prime is 6481775621. The reversal of 6481775617 is 7165771846.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7165771846 = 2 ⋅3582885923.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6481775617 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6481775611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59443 + ... + 128440.

It is an arithmetic number, because the mean of its divisors is an integer number (1620499500).

Almost surely, 2^6481775617 is an apocalyptic number.

It is an amenable number.

6481775617 is a deficient number, since it is larger than the sum of its proper divisors (222383).

6481775617 is a wasteful number, since it uses less digits than its factorization.

6481775617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222382.

The product of its digits is 1975680, while the sum is 52.

The square root of 6481775617 is about 80509.4753243368. The cubic root of 6481775617 is about 1864.5097736649.

The spelling of 6481775617 in words is "six billion, four hundred eighty-one million, seven hundred seventy-five thousand, six hundred seventeen".