64465321206644 has 6 divisors (see below), whose sum is σ = 112814312111634. Its totient is φ = 32232660603320.

The previous prime is 64465321206593. The next prime is 64465321206661. The reversal of 64465321206644 is 44660212356446.

It can be written as a sum of positive squares in only one way, i.e., 35348375702500 + 29116945504144 = 5945450^2 + 5396012^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8058165150827 + ... + 8058165150834.

It is an arithmetic number, because the mean of its divisors is an integer number (18802385351939).

Almost surely, 2^{64465321206644} is an apocalyptic number.

It is an amenable number.

64465321206644 is a deficient number, since it is larger than the sum of its proper divisors (48348990904990).

64465321206644 is a wasteful number, since it uses less digits than its factorization.

64465321206644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16116330301665 (or 16116330301663 counting only the distinct ones).

The product of its (nonzero) digits is 19906560, while the sum is 53.

The spelling of 64465321206644 in words is "sixty-four trillion, four hundred sixty-five billion, three hundred twenty-one million, two hundred six thousand, six hundred forty-four".