64502449036945 has 4 divisors (see below), whose sum is σ = 77402938844340. Its totient is φ = 51601959229552.

The previous prime is 64502449036937. The next prime is 64502449036967. The reversal of 64502449036945 is 54963094420546.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 42979864145409 + 21522584891536 = 6555903^2 + 4639244^2 .

It is a cyclic number.

It is not a de Polignac number, because 64502449036945 - 2³ = 64502449036937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6450244903690 + ... + 6450244903699.

It is an arithmetic number, because the mean of its divisors is an integer number (19350734711085).

Almost surely, 2^{64502449036945} is an apocalyptic number.

It is an amenable number.

64502449036945 is a deficient number, since it is larger than the sum of its proper divisors (12900489807395).

64502449036945 is a wasteful number, since it uses less digits than its factorization.

64502449036945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12900489807394.

The product of its (nonzero) digits is 111974400, while the sum is 61.

The spelling of 64502449036945 in words is "sixty-four trillion, five hundred two billion, four hundred forty-nine million, thirty-six thousand, nine hundred forty-five".