133464521421665 has 16 divisors (see below), whose sum is σ = 184849306053120. Its totient is φ = 90612404923200.

The previous prime is 133464521421643. The next prime is 133464521421667. The reversal of 133464521421665 is 566124125464331.

It is not a de Polignac number, because 133464521421665 - 2⁶ = 133464521421601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133464521421667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 18877580825 + ... + 18877587894.

It is an arithmetic number, because the mean of its divisors is an integer number (11553081628320).

Almost surely, 2^{133464521421665} is an apocalyptic number.

It is an amenable number.

133464521421665 is a deficient number, since it is larger than the sum of its proper divisors (51384784631455).

133464521421665 is a wasteful number, since it uses less digits than its factorization.

133464521421665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37755168832.

The product of its digits is 12441600, while the sum is 53.

Adding to 133464521421665 its reverse (566124125464331), we get a palindrome (699588646885996).

The spelling of 133464521421665 in words is "one hundred thirty-three trillion, four hundred sixty-four billion, five hundred twenty-one million, four hundred twenty-one thousand, six hundred sixty-five".