442131138652 has 12 divisors (see below), whose sum is σ = 884262277360. Its totient is φ = 189484773696.

The previous prime is 442131138649. The next prime is 442131138733. The reversal of 442131138652 is 256831131244.

442131138652 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7895198877 + ... + 7895198932.

Almost surely, 2^442131138652 is an apocalyptic number.

It is an amenable number.

442131138652 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

442131138652 is a wasteful number, since it uses less digits than its factorization.

442131138652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15790397820 (or 15790397818 counting only the distinct ones).

The product of its digits is 138240, while the sum is 40.

Adding to 442131138652 its reverse (256831131244), we get a palindrome (698962269896).

The spelling of 442131138652 in words is "four hundred forty-two billion, one hundred thirty-one million, one hundred thirty-eight thousand, six hundred fifty-two".