42478858816 has 21 divisors (see below), whose sum is σ = 84297257491. Its totient is φ = 21238604992.

The previous prime is 42478858813. The next prime is 42478858843. The reversal of 42478858816 is 61885887424.

The square root of 42478858816 is 206104.

It is a perfect power (a square), and thus also a powerful number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42478858813) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 1635951 + ... + 1661713.

Almost surely, 2^42478858816 is an apocalyptic number.

42478858816 is the 206104-th square number.

It is an amenable number.

42478858816 is a deficient number, since it is larger than the sum of its proper divisors (41818398675).

42478858816 is an frugal number, since it uses more digits than its factorization.

42478858816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51538 (or 25765 counting only the distinct ones).

The product of its digits is 27525120, while the sum is 61.

The spelling of 42478858816 in words is "forty-two billion, four hundred seventy-eight million, eight hundred fifty-eight thousand, eight hundred sixteen".