641815250577 has 16 divisors (see below), whose sum is σ = 872779995648. Its totient is φ = 419379966720.

The previous prime is 641815250569. The next prime is 641815250581. The reversal of 641815250577 is 775052518146.

641815250577 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 641815250577 - 2³ = 641815250569 is a prime.

It is not an unprimeable number, because it can be changed into a prime (641815250597) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1879048 + ... + 2194185.

It is an arithmetic number, because the mean of its divisors is an integer number (54548749728).

Almost surely, 2^641815250577 is an apocalyptic number.

It is an amenable number.

641815250577 is a deficient number, since it is larger than the sum of its proper divisors (230964745071).

641815250577 is a wasteful number, since it uses less digits than its factorization.

641815250577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4074280.

The product of its (nonzero) digits is 2352000, while the sum is 51.

The spelling of 641815250577 in words is "six hundred forty-one billion, eight hundred fifteen million, two hundred fifty thousand, five hundred seventy-seven".