42640240660 has 48 divisors (see below), whose sum is σ = 89955709200. Its totient is φ = 16977945600.

The previous prime is 42640240651. The next prime is 42640240673. The reversal of 42640240660 is 6604204624.

It can be written as a sum of positive squares in 8 ways, for example, as 54140164 + 42586100496 = 7358^2 + 206364^2 .

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4301710 + ... + 4311610.

It is an arithmetic number, because the mean of its divisors is an integer number (1874077275).

Almost surely, 2^42640240660 is an apocalyptic number.

It is an amenable number.

42640240660 is an abundant number, since it is smaller than the sum of its proper divisors (47315468540).

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

42640240660 is a wasteful number, since it uses less digits than its factorization.

42640240660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10876 (or 10874 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 34.

It can be divided in two parts, 42640240 and 660, that added together give a square (42640900 = 6530²).

The spelling of 42640240660 in words is "forty-two billion, six hundred forty million, two hundred forty thousand, six hundred sixty".