42156664524 has 72 divisors (see below), whose sum is σ = 118461779072. Its totient is φ = 12552848640.

The previous prime is 42156664519. The next prime is 42156664531. The reversal of 42156664524 is 42546665124.

It is a self number, because there is not a number n which added to its sum of digits gives 42156664524.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1438369 + ... + 1467384.

Almost surely, 2^42156664524 is an apocalyptic number.

It is an amenable number.

42156664524 is an abundant number, since it is smaller than the sum of its proper divisors (76305114548).

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

42156664524 is a wasteful number, since it uses less digits than its factorization.

42156664524 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2905807 (or 2905802 counting only the distinct ones).

The product of its digits is 1382400, while the sum is 45.

The spelling of 42156664524 in words is "forty-two billion, one hundred fifty-six million, six hundred sixty-four thousand, five hundred twenty-four".