64340644764 has 24 divisors (see below), whose sum is σ = 163776187008. Its totient is φ = 19497165040.

The previous prime is 64340644727. The next prime is 64340644789. The reversal of 64340644764 is 46744604346.

64340644764 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243714432 + ... + 243714695.

It is an arithmetic number, because the mean of its divisors is an integer number (6824007792).

Almost surely, 2^64340644764 is an apocalyptic number.

It is an amenable number.

64340644764 is an abundant number, since it is smaller than the sum of its proper divisors (99435542244).

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

64340644764 is a wasteful number, since it uses less digits than its factorization.

64340644764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487429145 (or 487429143 counting only the distinct ones).

The product of its (nonzero) digits is 4644864, while the sum is 48.

The spelling of 64340644764 in words is "sixty-four billion, three hundred forty million, six hundred forty-four thousand, seven hundred sixty-four".