33138735953 has 4 divisors (see below), whose sum is σ = 35088073380. Its totient is φ = 31189398528.

The previous prime is 33138735947. The next prime is 33138735977. The reversal of 33138735953 is 35953783133.

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

It can be written as a sum of positive squares in 2 ways, for example, as 29554079569 + 3584656384 = 171913^2 + 59872^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-33138735953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (33138735923) 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, 974668688 + ... + 974668721.

It is an arithmetic number, because the mean of its divisors is an integer number (8772018345).

Almost surely, 2^33138735953 is an apocalyptic number.

It is an amenable number.

33138735953 is a deficient number, since it is larger than the sum of its proper divisors (1949337427).

33138735953 is a wasteful number, since it uses less digits than its factorization.

33138735953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1949337426.

The product of its digits is 3061800, while the sum is 50.

The spelling of 33138735953 in words is "thirty-three billion, one hundred thirty-eight million, seven hundred thirty-five thousand, nine hundred fifty-three".