664143505341465 has 32 divisors (see below), whose sum is σ = 1064883807912960. Its totient is φ = 353458687405824.

The previous prime is 664143505341451. The next prime is 664143505341469. The reversal of 664143505341465 is 564143505341466.

664143505341465 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 664143505341465 - 2¹² = 664143505337369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (664143505341469) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 42042072 + ... + 55640118.

It is an arithmetic number, because the mean of its divisors is an integer number (33277618997280).

Almost surely, 2^{664143505341465} is an apocalyptic number.

It is an amenable number.

664143505341465 is a deficient number, since it is larger than the sum of its proper divisors (400740302571495).

664143505341465 is a wasteful number, since it uses less digits than its factorization.

664143505341465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13604961.

The product of its (nonzero) digits is 62208000, while the sum is 57.

Subtracting from 664143505341465 its reverse (564143505341466), we obtain a palindrome (99999999999999).

The spelling of 664143505341465 in words is "six hundred sixty-four trillion, one hundred forty-three billion, five hundred five million, three hundred forty-one thousand, four hundred sixty-five".