642441412630 has 16 divisors (see below), whose sum is σ = 1156562090640. Its totient is φ = 256939332192.

The previous prime is 642441412583. The next prime is 642441412631. The reversal of 642441412630 is 36214144246.

It is a self number, because there is not a number n which added to its sum of digits gives 642441412630.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642441412631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4581585 + ... + 4719724.

It is an arithmetic number, because the mean of its divisors is an integer number (72285130665).

Almost surely, 2^642441412630 is an apocalyptic number.

642441412630 is a deficient number, since it is larger than the sum of its proper divisors (514120678010).

642441412630 is a wasteful number, since it uses less digits than its factorization.

642441412630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9308223.

The product of its (nonzero) digits is 110592, while the sum is 37.

Adding to 642441412630 its reverse (36214144246), we get a palindrome (678655556876).

The spelling of 642441412630 in words is "six hundred forty-two billion, four hundred forty-one million, four hundred twelve thousand, six hundred thirty".