133565551245161 has 4 divisors (see below), whose sum is σ = 152646344280192. Its totient is φ = 114484758210132.

The previous prime is 133565551245053. The next prime is 133565551245163. The reversal of 133565551245161 is 161542155565331.

It is a happy number.

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 a cyclic number.

It is not a de Polignac number, because 133565551245161 - 2¹⁴ = 133565551228777 is a prime.

It is not an unprimeable number, because it can be changed into a prime (133565551245163) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9540396517505 + ... + 9540396517518.

It is an arithmetic number, because the mean of its divisors is an integer number (38161586070048).

Almost surely, 2^{133565551245161} is an apocalyptic number.

It is an amenable number.

133565551245161 is a deficient number, since it is larger than the sum of its proper divisors (19080793035031).

133565551245161 is an equidigital number, since it uses as much as digits as its factorization.

133565551245161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19080793035030.

The product of its digits is 8100000, while the sum is 53.

The spelling of 133565551245161 in words is "one hundred thirty-three trillion, five hundred sixty-five billion, five hundred fifty-one million, two hundred forty-five thousand, one hundred sixty-one".