39946659584 has 72 divisors (see below), whose sum is σ = 86351927760. Its totient is φ = 18333646848.

The previous prime is 39946659547. The next prime is 39946659587. The reversal of 39946659584 is 48595664993.

It is a super-2 number, since 2×39946659584² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (39946659587) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 562184 + ... + 629240.

It is an arithmetic number, because the mean of its divisors is an integer number (1199332330).

Almost surely, 2^39946659584 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 39946659584, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43175963880).

39946659584 is an abundant number, since it is smaller than the sum of its proper divisors (46405268176).

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

39946659584 is a wasteful number, since it uses less digits than its factorization.

39946659584 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67265 (or 67251 counting only the distinct ones).

The product of its digits is 251942400, while the sum is 68.

The spelling of 39946659584 in words is "thirty-nine billion, nine hundred forty-six million, six hundred fifty-nine thousand, five hundred eighty-four".