39649399648 has 48 divisors (see below), whose sum is σ = 80044675200. Its totient is φ = 19321574400.

The previous prime is 39649399637. The next prime is 39649399667. The reversal of 39649399648 is 84699394693.

It is a congruent number.

It is an unprimeable number.

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, 1324753 + ... + 1354351.

It is an arithmetic number, because the mean of its divisors is an integer number (1667597400).

Almost surely, 2^39649399648 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 39649399648, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40022337600).

39649399648 is an abundant number, since it is smaller than the sum of its proper divisors (40395275552).

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

39649399648 is a wasteful number, since it uses less digits than its factorization.

39649399648 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30671 (or 30663 counting only the distinct ones).

The product of its digits is 272097792, while the sum is 70.

The spelling of 39649399648 in words is "thirty-nine billion, six hundred forty-nine million, three hundred ninety-nine thousand, six hundred forty-eight".