640130204025 has 576 divisors, whose sum is σ = 1383111475200. Its totient is φ = 291279006720.

The previous prime is 640130204009. The next prime is 640130204027. The reversal of 640130204025 is 520402031046.

640130204025 is a `hidden beast` number, since 6 + 401 + 30 + 204 + 0 + 25 = 666.

640130204025 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 640130204025 - 2⁴ = 640130204009 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a self number, because there is not a number n which added to its sum of digits gives 640130204025.

It is not an unprimeable number, because it can be changed into a prime (640130204027) by changing a digit.

It is a polite number, since it can be written in 575 ways as a sum of consecutive naturals, for example, 8102913936 + ... + 8102914014.

It is an arithmetic number, because the mean of its divisors is an integer number (2401235200).

Almost surely, 2^640130204025 is an apocalyptic number.

640130204025 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

640130204025 is an abundant number, since it is smaller than the sum of its proper divisors (742981271175).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

640130204025 is a wasteful number, since it uses less digits than its factorization.

640130204025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 260 (or 243 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The spelling of 640130204025 in words is "six hundred forty billion, one hundred thirty million, two hundred four thousand, twenty-five".