642523110225 has 12 divisors (see below), whose sum is σ = 1062304875696. Its totient is φ = 342678992080.

The previous prime is 642523110179. The next prime is 642523110239. The reversal of 642523110225 is 522011325246.

It is a happy number.

642523110225 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 642523110225 - 2¹⁰ = 642523109201 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4283487327 + ... + 4283487476.

It is an arithmetic number, because the mean of its divisors is an integer number (88525406308).

Almost surely, 2^642523110225 is an apocalyptic number.

It is an amenable number.

642523110225 is a deficient number, since it is larger than the sum of its proper divisors (419781765471).

642523110225 is a wasteful number, since it uses less digits than its factorization.

642523110225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8566974816 (or 8566974811 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 33.

The spelling of 642523110225 in words is "six hundred forty-two billion, five hundred twenty-three million, one hundred ten thousand, two hundred twenty-five".