6564434025 has 24 divisors (see below), whose sum is σ = 11325078720. Its totient is φ = 3348811840.

The previous prime is 6564434021. The next prime is 6564434029. The reversal of 6564434025 is 5204344656.

It is an interprime number because it is at equal distance from previous prime (6564434021) and next prime (6564434029).

It is not a de Polignac number, because 6564434025 - 2² = 6564434021 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6564434021) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1901010 + ... + 1904459.

It is an arithmetic number, because the mean of its divisors is an integer number (471878280).

Almost surely, 2^6564434025 is an apocalyptic number.

It is an amenable number.

6564434025 is a deficient number, since it is larger than the sum of its proper divisors (4760644695).

6564434025 is a wasteful number, since it uses less digits than its factorization.

6564434025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3805505 (or 3805500 counting only the distinct ones).

The product of its (nonzero) digits is 345600, while the sum is 39.

The square root of 6564434025 is about 81021.1949121957. The cubic root of 6564434025 is about 1872.4019983136.

The spelling of 6564434025 in words is "six billion, five hundred sixty-four million, four hundred thirty-four thousand, twenty-five".