42515521566 has 16 divisors (see below), whose sum is σ = 97178335104. Its totient is φ = 12147291864.

The previous prime is 42515521523. The next prime is 42515521567. The reversal of 42515521566 is 66512551524.

42515521566 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×42515521566² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42), and also a Moran number because the ratio is a prime number: 1012274323 = 42515521566 / (4 + 2 + 5 + 1 + 5 + 5 + 2 + 1 + 5 + 6 + 6).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42515521567) 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, 506137120 + ... + 506137203.

It is an arithmetic number, because the mean of its divisors is an integer number (6073645944).

Almost surely, 2^42515521566 is an apocalyptic number.

42515521566 is an abundant number, since it is smaller than the sum of its proper divisors (54662813538).

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

42515521566 is a wasteful number, since it uses less digits than its factorization.

42515521566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1012274335.

The product of its digits is 360000, while the sum is 42.

The spelling of 42515521566 in words is "forty-two billion, five hundred fifteen million, five hundred twenty-one thousand, five hundred sixty-six".