33728918869 has 4 divisors (see below), whose sum is σ = 34300595520. Its totient is φ = 33157242220.

The previous prime is 33728918857. The next prime is 33728918903. The reversal of 33728918869 is 96881982733.

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-33728918869 is a prime.

It is a super-2 number, since 2×33728918869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 33728918869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33728918369) 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, 285838237 + ... + 285838354.

It is an arithmetic number, because the mean of its divisors is an integer number (8575148880).

Almost surely, 2^33728918869 is an apocalyptic number.

It is an amenable number.

33728918869 is a deficient number, since it is larger than the sum of its proper divisors (571676651).

33728918869 is an equidigital number, since it uses as much as digits as its factorization.

33728918869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571676650.

The product of its digits is 31352832, while the sum is 64.

The spelling of 33728918869 in words is "thirty-three billion, seven hundred twenty-eight million, nine hundred eighteen thousand, eight hundred sixty-nine".