133564309901 has 4 divisors (see below), whose sum is σ = 145706519904. Its totient is φ = 121422099900.

The previous prime is 133564309849. The next prime is 133564309909. The reversal of 133564309901 is 109903465331.

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 a de Polignac number, because none of the positive numbers 2^k-133564309901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133564309909) 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, 6071104985 + ... + 6071105006.

It is an arithmetic number, because the mean of its divisors is an integer number (36426629976).

Almost surely, 2^133564309901 is an apocalyptic number.

133564309901 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

133564309901 is a deficient number, since it is larger than the sum of its proper divisors (12142210003).

133564309901 is a wasteful number, since it uses less digits than its factorization.

133564309901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12142210002.

The product of its (nonzero) digits is 262440, while the sum is 44.

It can be divided in two parts, 13356430 and 9901, that added together give a palindrome (13366331).

The spelling of 133564309901 in words is "one hundred thirty-three billion, five hundred sixty-four million, three hundred nine thousand, nine hundred one".