642610231250 has 48 divisors (see below), whose sum is σ = 1297495470600. Its totient is φ = 237271440000.

The previous prime is 642610231243. The next prime is 642610231267. The reversal of 642610231250 is 52132016246.

It can be written as a sum of positive squares in 12 ways, for example, as 371489031001 + 271121200249 = 609499^2 + 520693^2 .

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3873275 + ... + 4035774.

Almost surely, 2^642610231250 is an apocalyptic number.

642610231250 is an abundant number, since it is smaller than the sum of its proper divisors (654885239350).

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

642610231250 is an equidigital number, since it uses as much as digits as its factorization.

642610231250 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7909089 (or 7909069 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 32.

Adding to 642610231250 its reverse (52132016246), we get a palindrome (694742247496).

The spelling of 642610231250 in words is "six hundred forty-two billion, six hundred ten million, two hundred thirty-one thousand, two hundred fifty".