645070576025 has 12 divisors (see below), whose sum is σ = 805255891500. Its totient is φ = 512592991680.

The previous prime is 645070576021. The next prime is 645070576027. The reversal of 645070576025 is 520675070546.

645070576025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 6 ways, for example, as 230210918809 + 414859657216 = 479803^2 + 644096^2 .

It is not a de Polignac number, because 645070576025 - 2² = 645070576021 is a prime.

It is a super-2 number, since 2×645070576025² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (645070576021) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 86582930 + ... + 86590379.

It is an arithmetic number, because the mean of its divisors is an integer number (67104657625).

Almost surely, 2^645070576025 is an apocalyptic number.

It is an amenable number.

645070576025 is a deficient number, since it is larger than the sum of its proper divisors (160185315475).

645070576025 is a wasteful number, since it uses less digits than its factorization.

645070576025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173173468 (or 173173463 counting only the distinct ones).

The product of its (nonzero) digits is 1764000, while the sum is 47.

The spelling of 645070576025 in words is "six hundred forty-five billion, seventy million, five hundred seventy-six thousand, twenty-five".