163664353523465 has 16 divisors (see below), whose sum is σ = 208095727577472. Its totient is φ = 123143275064064.

The previous prime is 163664353523423. The next prime is 163664353523467. The reversal of 163664353523465 is 564325353466361.

163664353523465 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 163664353523465 - 2¹² = 163664353519369 is a prime.

It is a super-2 number, since 2×163664353523465² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 163664353523398 and 163664353523407.

It is not an unprimeable number, because it can be changed into a prime (163664353523467) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 674532869 + ... + 674775458.

It is an arithmetic number, because the mean of its divisors is an integer number (13005982973592).

Almost surely, 2^{163664353523465} is an apocalyptic number.

It is an amenable number.

163664353523465 is a deficient number, since it is larger than the sum of its proper divisors (44431374054007).

163664353523465 is a wasteful number, since it uses less digits than its factorization.

163664353523465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1349309776.

The product of its digits is 419904000, while the sum is 62.

The spelling of 163664353523465 in words is "one hundred sixty-three trillion, six hundred sixty-four billion, three hundred fifty-three million, five hundred twenty-three thousand, four hundred sixty-five".