39649595943680 has 144 divisors (see below), whose sum is σ = 95204704008960. Its totient is φ = 15821194899456.

The previous prime is 39649595943677. The next prime is 39649595943701. The reversal of 39649595943680 is 8634959594693.

It is a Smith number, since the sum of its digits (80) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (80).

It is a junction number, because it is equal to n+sod(n) for n = 39649595943595 and 39649595943604.

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 15 ways as a sum of consecutive naturals, for example, 2593672997 + ... + 2593688283.

It is an arithmetic number, because the mean of its divisors is an integer number (661143777840).

Almost surely, 2^{39649595943680} 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 39649595943680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47602352004480).

39649595943680 is an abundant number, since it is smaller than the sum of its proper divisors (55555108065280).

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

39649595943680 is a wasteful number, since it uses less digits than its factorization.

39649595943680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20114 (or 20100 counting only the distinct ones).

The product of its (nonzero) digits is 6802444800, while the sum is 80.

The spelling of 39649595943680 in words is "thirty-nine trillion, six hundred forty-nine billion, five hundred ninety-five million, nine hundred forty-three thousand, six hundred eighty".