42006561256 has 32 divisors (see below), whose sum is σ = 85992645600. Its totient is φ = 19078306240.

The previous prime is 42006561251. The next prime is 42006561257. The reversal of 42006561256 is 65216560024.

It is not an unprimeable number, because it can be changed into a prime (42006561251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 86050 + ... + 302353.

It is an arithmetic number, because the mean of its divisors is an integer number (2687270175).

Almost surely, 2^42006561256 is an apocalyptic number.

It is an amenable number.

42006561256 is an abundant number, since it is smaller than the sum of its proper divisors (43986084344).

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

42006561256 is a wasteful number, since it uses less digits than its factorization.

42006561256 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389649 (or 389645 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 42006561256 in words is "forty-two billion, six million, five hundred sixty-one thousand, two hundred fifty-six".