133857465897 has 4 divisors (see below), whose sum is σ = 178476621200. Its totient is φ = 89238310596.

The previous prime is 133857465887. The next prime is 133857465949. The reversal of 133857465897 is 798564758331.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 133857465897 - 2¹⁶ = 133857400361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (133857465817) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22309577647 + ... + 22309577652.

It is an arithmetic number, because the mean of its divisors is an integer number (44619155300).

Almost surely, 2^133857465897 is an apocalyptic number.

It is an amenable number.

133857465897 is a deficient number, since it is larger than the sum of its proper divisors (44619155303).

133857465897 is an equidigital number, since it uses as much as digits as its factorization.

133857465897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44619155302.

The product of its digits is 152409600, while the sum is 66.

The spelling of 133857465897 in words is "one hundred thirty-three billion, eight hundred fifty-seven million, four hundred sixty-five thousand, eight hundred ninety-seven".