641426510025 has 144 divisors (see below), whose sum is σ = 1358344810368. Its totient is φ = 283236480000.

The previous prime is 641426509973. The next prime is 641426510027. The reversal of 641426510025 is 520015624146.

641426510025 is a `hidden beast` number, since 641 + 4 + 2 + 6 + 5 + 1 + 0 + 0 + 2 + 5 = 666.

It is not a de Polignac number, because 641426510025 - 2⁹ = 641426509513 is a prime.

It is a super-2 number, since 2×641426510025² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (641426510027) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 6472902 + ... + 6571248.

It is an arithmetic number, because the mean of its divisors is an integer number (9432950072).

Almost surely, 2^641426510025 is an apocalyptic number.

It is an amenable number.

641426510025 is an abundant number, since it is smaller than the sum of its proper divisors (716918300343).

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

641426510025 is a wasteful number, since it uses less digits than its factorization.

641426510025 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98512 (or 98504 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

The spelling of 641426510025 in words is "six hundred forty-one billion, four hundred twenty-six million, five hundred ten thousand, twenty-five".