642488118340 has 12 divisors (see below), whose sum is σ = 1349225048556. Its totient is φ = 256995247328.

The previous prime is 642488118287. The next prime is 642488118361. The reversal of 642488118340 is 43811884246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 455573701444 + 186914416896 = 674962^2 + 432336^2 .

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, 16062202939 + ... + 16062202978.

It is an arithmetic number, because the mean of its divisors is an integer number (112435420713).

Almost surely, 2^642488118340 is an apocalyptic number.

It is an amenable number.

642488118340 is an abundant number, since it is smaller than the sum of its proper divisors (706736930216).

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

642488118340 is a wasteful number, since it uses less digits than its factorization.

642488118340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32124405926 (or 32124405924 counting only the distinct ones).

The product of its (nonzero) digits is 1179648, while the sum is 49.

The spelling of 642488118340 in words is "six hundred forty-two billion, four hundred eighty-eight million, one hundred eighteen thousand, three hundred forty".