642520330712 has 64 divisors (see below), whose sum is σ = 1307036976000. Its totient is φ = 296101757952.

The previous prime is 642520330703. The next prime is 642520330721. The reversal of 642520330712 is 217033025246.

It is an interprime number because it is at equal distance from previous prime (642520330703) and next prime (642520330721).

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, 11801489 + ... + 11855807.

It is an arithmetic number, because the mean of its divisors is an integer number (20422452750).

Almost surely, 2^642520330712 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 642520330712, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (653518488000).

642520330712 is an abundant number, since it is smaller than the sum of its proper divisors (664516645288).

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

642520330712 is a wasteful number, since it uses less digits than its factorization.

642520330712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55037 (or 55007 counting only the distinct ones).

The product of its (nonzero) digits is 60480, while the sum is 35.

Adding to 642520330712 its reverse (217033025246), we get a palindrome (859553355958).

The spelling of 642520330712 in words is "six hundred forty-two billion, five hundred twenty million, three hundred thirty thousand, seven hundred twelve".