642441255412 has 48 divisors (see below), whose sum is σ = 1229064798528. Its totient is φ = 291403454720.

The previous prime is 642441255389. The next prime is 642441255427. The reversal of 642441255412 is 214552144246.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 113562888 + ... + 113568544.

It is an arithmetic number, because the mean of its divisors is an integer number (25605516636).

Almost surely, 2^642441255412 is an apocalyptic number.

It is an amenable number.

642441255412 is a deficient number, since it is larger than the sum of its proper divisors (586623543116).

642441255412 is a wasteful number, since it uses less digits than its factorization.

642441255412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10656 (or 10654 counting only the distinct ones).

The product of its digits is 307200, while the sum is 40.

Adding to 642441255412 its reverse (214552144246), we get a palindrome (856993399658).

The spelling of 642441255412 in words is "six hundred forty-two billion, four hundred forty-one million, two hundred fifty-five thousand, four hundred twelve".