64644551703 has 24 divisors (see below), whose sum is σ = 95730180000. Its totient is φ = 42011274240.

The previous prime is 64644551701. The next prime is 64644551749. The reversal of 64644551703 is 30715544646.

64644551703 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 64644551703 - 2¹ = 64644551701 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64644551701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 390750 + ... + 531012.

It is an arithmetic number, because the mean of its divisors is an integer number (3988757500).

Almost surely, 2^64644551703 is an apocalyptic number.

64644551703 is a deficient number, since it is larger than the sum of its proper divisors (31085628297).

64644551703 is a wasteful number, since it uses less digits than its factorization.

64644551703 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141559 (or 141556 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 64644551703 in words is "sixty-four billion, six hundred forty-four million, five hundred fifty-one thousand, seven hundred three".