39964940568 has 432 divisors, whose sum is σ = 134288317800. Its totient is φ = 11110659840.

The previous prime is 39964940549. The next prime is 39964940641. The reversal of 39964940568 is 86504946993.

39964940568 is a `hidden beast` number, since 3 + 9 + 9 + 64 + 9 + 4 + 0 + 568 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 105448203 + ... + 105448581.

Almost surely, 2^39964940568 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 39964940568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67144158900).

39964940568 is an abundant number, since it is smaller than the sum of its proper divisors (94323377232).

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

39964940568 is an equidigital number, since it uses as much as digits as its factorization.

39964940568 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 432 counting only the distinct ones).

The product of its (nonzero) digits is 50388480, while the sum is 63.

The spelling of 39964940568 in words is "thirty-nine billion, nine hundred sixty-four million, nine hundred forty thousand, five hundred sixty-eight".