42078560640 has 64 divisors (see below), whose sum is σ = 134125418160. Its totient is φ = 11220948992.

The previous prime is 42078560639. The next prime is 42078560687. The reversal of 42078560640 is 4606587024.

It is a tau number, because it is divible by the number of its divisors (64).

It is a junction number, because it is equal to n+sod(n) for n = 42078560592 and 42078560601.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10956039 + ... + 10959878.

Almost surely, 2^42078560640 is an apocalyptic number.

42078560640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42078560640 is an abundant number, since it is smaller than the sum of its proper divisors (92046857520).

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

42078560640 is a wasteful number, since it uses less digits than its factorization.

42078560640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21915939 (or 21915927 counting only the distinct ones).

The product of its (nonzero) digits is 322560, while the sum is 42.

The spelling of 42078560640 in words is "forty-two billion, seventy-eight million, five hundred sixty thousand, six hundred forty".