64456400012565 has 48 divisors (see below), whose sum is σ = 113458441723200. Its totient is φ = 31223906123520.

The previous prime is 64456400012531. The next prime is 64456400012569. The reversal of 64456400012565 is 56521000465446.

It is a happy number.

It is not a de Polignac number, because 64456400012565 - 2¹⁶ = 64456399947029 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64456400012569) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 13678575 + ... + 17776844.

It is an arithmetic number, because the mean of its divisors is an integer number (2363717535900).

Almost surely, 2^{64456400012565} is an apocalyptic number.

It is an amenable number.

64456400012565 is a deficient number, since it is larger than the sum of its proper divisors (49002041710635).

64456400012565 is a wasteful number, since it uses less digits than its factorization.

64456400012565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31456578 (or 31456567 counting only the distinct ones).

The product of its (nonzero) digits is 3456000, while the sum is 48.

The spelling of 64456400012565 in words is "sixty-four trillion, four hundred fifty-six billion, four hundred million, twelve thousand, five hundred sixty-five".