6464697800929 has 3 divisors (see below), whose sum is σ = 6464700343507. Its totient is φ = 6464695258352.

The previous prime is 6464697800921. The next prime is 6464697800969. The reversal of 6464697800929 is 9290087964646.

The square root of 6464697800929 is 2542577.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 877865933025 + 5586831867904 = 936945^2 + 2363648^2 .

It is not a de Polignac number, because 6464697800929 - 2³ = 6464697800921 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6464697800921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1271289 + ... + 3813865.

Almost surely, 2^{6464697800929} is an apocalyptic number.

6464697800929 is the 2542577-th square number.

6464697800929 is the 1271289-th centered octagonal number.

It is an amenable number.

6464697800929 is a deficient number, since it is larger than the sum of its proper divisors (2542578).

6464697800929 is an frugal number, since it uses more digits than its factorization.

6464697800929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5085154 (or 2542577 counting only the distinct ones).

The product of its (nonzero) digits is 282175488, while the sum is 70.

The spelling of 6464697800929 in words is "six trillion, four hundred sixty-four billion, six hundred ninety-seven million, eight hundred thousand, nine hundred twenty-nine".