42615661566 has 16 divisors (see below), whose sum is σ = 86310201600. Its totient is φ = 14025407448.

The previous prime is 42615661537. The next prime is 42615661589. The reversal of 42615661566 is 66516651624.

It is a super-2 number, since 2×42615661566² (a number of 22 digits) contains 22 as substring.

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, 44952756 + ... + 44953703.

It is an arithmetic number, because the mean of its divisors is an integer number (5394387600).

Almost surely, 2^42615661566 is an apocalyptic number.

42615661566 is an abundant number, since it is smaller than the sum of its proper divisors (43694540034).

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

42615661566 is a wasteful number, since it uses less digits than its factorization.

42615661566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89906543.

The product of its digits is 1555200, while the sum is 48.

The spelling of 42615661566 in words is "forty-two billion, six hundred fifteen million, six hundred sixty-one thousand, five hundred sixty-six".