41978705664 has 144 divisors (see below), whose sum is σ = 128880315648. Its totient is φ = 11881660416.

The previous prime is 41978705653. The next prime is 41978705689. The reversal of 41978705664 is 46650787914.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 538744 + ... + 611720.

It is an arithmetic number, because the mean of its divisors is an integer number (895002192).

Almost surely, 2^41978705664 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 41978705664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (64440157824).

41978705664 is an abundant number, since it is smaller than the sum of its proper divisors (86901609984).

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

41978705664 is a wasteful number, since it uses less digits than its factorization.

41978705664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73110 (or 73096 counting only the distinct ones).

The product of its (nonzero) digits is 10160640, while the sum is 57.

The spelling of 41978705664 in words is "forty-one billion, nine hundred seventy-eight million, seven hundred five thousand, six hundred sixty-four".