42661640256 has 56 divisors (see below), whose sum is σ = 113737302624. Its totient is φ = 14111984640.

The previous prime is 42661640249. The next prime is 42661640279. The reversal of 42661640256 is 65204616624.

42661640256 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, 822925 + ... + 873228.

Almost surely, 2^42661640256 is an apocalyptic number.

It is an amenable number.

42661640256 is an abundant number, since it is smaller than the sum of its proper divisors (71075662368).

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

42661640256 is a wasteful number, since it uses less digits than its factorization.

42661640256 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1696299 (or 1696289 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 42.

The spelling of 42661640256 in words is "forty-two billion, six hundred sixty-one million, six hundred forty thousand, two hundred fifty-six".