642268688604 has 24 divisors (see below), whose sum is σ = 1498649353488. Its totient is φ = 214086360960.

The previous prime is 642268688603. The next prime is 642268688687. The reversal of 642268688604 is 406886862246.

It is a happy number.

It is a super-2 number, since 2×642268688604² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (642268688603) 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, 520224 + ... + 1247064.

It is an arithmetic number, because the mean of its divisors is an integer number (62443723062).

Almost surely, 2^642268688604 is an apocalyptic number.

It is an amenable number.

642268688604 is an abundant number, since it is smaller than the sum of its proper divisors (856380664884).

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

642268688604 is a wasteful number, since it uses less digits than its factorization.

642268688604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 800485 (or 800483 counting only the distinct ones).

The product of its (nonzero) digits is 42467328, while the sum is 60.

The spelling of 642268688604 in words is "six hundred forty-two billion, two hundred sixty-eight million, six hundred eighty-eight thousand, six hundred four".