6421466945 has 32 divisors (see below), whose sum is σ = 8502810624. Its totient is φ = 4639219200.

The previous prime is 6421466941. The next prime is 6421466977. The reversal of 6421466945 is 5496641246.

It is not a de Polignac number, because 6421466945 - 2² = 6421466941 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6421466945.

It is not an unprimeable number, because it can be changed into a prime (6421466941) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 124199 + ... + 168131.

It is an arithmetic number, because the mean of its divisors is an integer number (265712832).

Almost surely, 2^6421466945 is an apocalyptic number.

It is an amenable number.

6421466945 is a deficient number, since it is larger than the sum of its proper divisors (2081343679).

6421466945 is a wasteful number, since it uses less digits than its factorization.

6421466945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44033.

The product of its digits is 1244160, while the sum is 47.

The square root of 6421466945 is about 80134.0560872841. The cubic root of 6421466945 is about 1858.7090654039.

The spelling of 6421466945 in words is "six billion, four hundred twenty-one million, four hundred sixty-six thousand, nine hundred forty-five".