64817645764 has 24 divisors (see below), whose sum is σ = 120134333088. Its totient is φ = 30494536320.

The previous prime is 64817645723. The next prime is 64817645771. The reversal of 64817645764 is 46754671846.

It is a junction number, because it is equal to n+sod(n) for n = 64817645699 and 64817645708.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 146067 + ... + 388549.

It is an arithmetic number, because the mean of its divisors is an integer number (5005597212).

Almost surely, 2^64817645764 is an apocalyptic number.

It is an amenable number.

64817645764 is a deficient number, since it is larger than the sum of its proper divisors (55316687324).

64817645764 is a wasteful number, since it uses less digits than its factorization.

64817645764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246435 (or 246433 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 58.

The spelling of 64817645764 in words is "sixty-four billion, eight hundred seventeen million, six hundred forty-five thousand, seven hundred sixty-four".