33030721861 has 8 divisors (see below), whose sum is σ = 34172709120. Its totient is φ = 31888934448.

The previous prime is 33030721847. The next prime is 33030721891. The reversal of 33030721861 is 16812703033.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 33030721861 - 2¹⁹ = 33030197573 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33030721811) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 337300 + ... + 424066.

It is an arithmetic number, because the mean of its divisors is an integer number (4271588640).

Almost surely, 2^33030721861 is an apocalyptic number.

It is an amenable number.

33030721861 is a deficient number, since it is larger than the sum of its proper divisors (1141987259).

33030721861 is a wasteful number, since it uses less digits than its factorization.

33030721861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99923.

The product of its (nonzero) digits is 18144, while the sum is 34.

The spelling of 33030721861 in words is "thirty-three billion, thirty million, seven hundred twenty-one thousand, eight hundred sixty-one".