64449033720140 has 48 divisors (see below), whose sum is σ = 141075529184352. Its totient is φ = 24708496006656.

The previous prime is 64449033720133. The next prime is 64449033720163. The reversal of 64449033720140 is 4102733094446.

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, 649900337 + ... + 649999496.

It is an arithmetic number, because the mean of its divisors is an integer number (2939073524674).

Almost surely, 2^{64449033720140} is an apocalyptic number.

It is an amenable number.

64449033720140 is an abundant number, since it is smaller than the sum of its proper divisors (76626495464212).

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

64449033720140 is a wasteful number, since it uses less digits than its factorization.

64449033720140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1299899946 (or 1299899944 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 47.

The spelling of 64449033720140 in words is "sixty-four trillion, four hundred forty-nine billion, thirty-three million, seven hundred twenty thousand, one hundred forty".