6412917721 has 4 divisors (see below), whose sum is σ = 7329048832. Its totient is φ = 5496786612.

The previous prime is 6412917689. The next prime is 6412917733. The reversal of 6412917721 is 1277192146.

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.

It is a cyclic number.

It is not a de Polignac number, because 6412917721 - 2⁵ = 6412917689 is a prime.

It is a super-2 number, since 2×6412917721² = 82251027392631667682, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (6412917751) 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, 458065545 + ... + 458065558.

It is an arithmetic number, because the mean of its divisors is an integer number (1832262208).

Almost surely, 2^6412917721 is an apocalyptic number.

It is an amenable number.

6412917721 is a deficient number, since it is larger than the sum of its proper divisors (916131111).

6412917721 is an equidigital number, since it uses as much as digits as its factorization.

6412917721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 916131110.

The product of its digits is 42336, while the sum is 40.

The square root of 6412917721 is about 80080.6950581724. The cubic root of 6412917721 is about 1857.8838345826.

The spelling of 6412917721 in words is "six billion, four hundred twelve million, nine hundred seventeen thousand, seven hundred twenty-one".