33072193138 has 4 divisors (see below), whose sum is σ = 49608289710. Its totient is φ = 16536096568.

The previous prime is 33072193129. The next prime is 33072193139. The reversal of 33072193138 is 83139127033.

It is a happy number.

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., 26244972009 + 6827221129 = 162003^2 + 82627^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 33072193138.

It is not an unprimeable number, because it can be changed into a prime (33072193139) 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 as a sum of consecutive naturals, namely, 8268048283 + ... + 8268048286.

Almost surely, 2^33072193138 is an apocalyptic number.

33072193138 is a deficient number, since it is larger than the sum of its proper divisors (16536096572).

33072193138 is a wasteful number, since it uses less digits than its factorization.

33072193138 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16536096571.

The product of its (nonzero) digits is 81648, while the sum is 40.

The spelling of 33072193138 in words is "thirty-three billion, seventy-two million, one hundred ninety-three thousand, one hundred thirty-eight".