42165554656 has 48 divisors (see below), whose sum is σ = 83500429824. Its totient is φ = 20959465984.

The previous prime is 42165554579. The next prime is 42165554723. The reversal of 42165554656 is 65645556124.

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, 3879726 + ... + 3890578.

It is an arithmetic number, because the mean of its divisors is an integer number (1739592288).

Almost surely, 2^42165554656 is an apocalyptic number.

It is an amenable number.

42165554656 is a deficient number, since it is larger than the sum of its proper divisors (41334875168).

42165554656 is a wasteful number, since it uses less digits than its factorization.

42165554656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11563 (or 11555 counting only the distinct ones).

The product of its digits is 4320000, while the sum is 49.

The spelling of 42165554656 in words is "forty-two billion, one hundred sixty-five million, five hundred fifty-four thousand, six hundred fifty-six".