133564309898 has 4 divisors (see below), whose sum is σ = 200346464850. Its totient is φ = 66782154948.

The previous prime is 133564309849. The next prime is 133564309909. The reversal of 133564309898 is 898903465331.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 128269273609 + 5295036289 = 358147^2 + 72767^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33391077473 + ... + 33391077476.

Almost surely, 2^133564309898 is an apocalyptic number.

133564309898 is a deficient number, since it is larger than the sum of its proper divisors (66782154952).

133564309898 is an equidigital number, since it uses as much as digits as its factorization.

133564309898 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66782154951.

The product of its (nonzero) digits is 16796160, while the sum is 59.

The spelling of 133564309898 in words is "one hundred thirty-three billion, five hundred sixty-four million, three hundred nine thousand, eight hundred ninety-eight".