133194245878 has 4 divisors (see below), whose sum is σ = 199791368820. Its totient is φ = 66597122938.

The previous prime is 133194245867. The next prime is 133194245879. The reversal of 133194245878 is 878542491331.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (133194245879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33298561468 + ... + 33298561471.

It is an arithmetic number, because the mean of its divisors is an integer number (49947842205).

Almost surely, 2^133194245878 is an apocalyptic number.

133194245878 is a deficient number, since it is larger than the sum of its proper divisors (66597122942).

133194245878 is an equidigital number, since it uses as much as digits as its factorization.

133194245878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66597122941.

The product of its digits is 5806080, while the sum is 55.

The spelling of 133194245878 in words is "one hundred thirty-three billion, one hundred ninety-four million, two hundred forty-five thousand, eight hundred seventy-eight".