6464105251 has 4 divisors (see below), whose sum is σ = 6552654712. Its totient is φ = 6375555792.

The previous prime is 6464105231. The next prime is 6464105267. The reversal of 6464105251 is 1525014646.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6464105251 - 2²³ = 6455716643 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464105231) 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, 44274621 + ... + 44274766.

It is an arithmetic number, because the mean of its divisors is an integer number (1638163678).

Almost surely, 2^6464105251 is an apocalyptic number.

6464105251 is a deficient number, since it is larger than the sum of its proper divisors (88549461).

6464105251 is an equidigital number, since it uses as much as digits as its factorization.

6464105251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88549460.

The product of its (nonzero) digits is 28800, while the sum is 34.

The square root of 6464105251 is about 80399.6595204233. The cubic root of 6464105251 is about 1862.8139135227.

Adding to 6464105251 its reverse (1525014646), we get a palindrome (7989119897).

The spelling of 6464105251 in words is "six billion, four hundred sixty-four million, one hundred five thousand, two hundred fifty-one".