133520631265 has 32 divisors (see below), whose sum is σ = 187157228544. Its totient is φ = 89538462720.

The previous prime is 133520631263. The next prime is 133520631287. The reversal of 133520631265 is 562136025331.

It is not a de Polignac number, because 133520631265 - 2¹ = 133520631263 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133520631263) 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, 2102275 + ... + 2164855.

It is an arithmetic number, because the mean of its divisors is an integer number (5848663392).

Almost surely, 2^133520631265 is an apocalyptic number.

It is an amenable number.

133520631265 is a deficient number, since it is larger than the sum of its proper divisors (53636597279).

133520631265 is a wasteful number, since it uses less digits than its factorization.

133520631265 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63937.

The product of its (nonzero) digits is 97200, while the sum is 37.

Adding to 133520631265 its reverse (562136025331), we get a palindrome (695656656596).

The spelling of 133520631265 in words is "one hundred thirty-three billion, five hundred twenty million, six hundred thirty-one thousand, two hundred sixty-five".