33640235641 has 8 divisors (see below), whose sum is σ = 34005371624. Its totient is φ = 33275473920.

The previous prime is 33640235633. The next prime is 33640235659. The reversal of 33640235641 is 14653204633.

It can be written as a sum of positive squares in 4 ways, for example, as 39879225 + 33600356416 = 6315^2 + 183304^2 .

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 33640235641 - 2³ = 33640235633 is a prime.

It is a super-2 number, since 2×33640235641² (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 33640235641.

It is not an unprimeable number, because it can be changed into a prime (33640235611) 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 in 7 ways as a sum of consecutive naturals, for example, 89101 + ... + 274261.

It is an arithmetic number, because the mean of its divisors is an integer number (4250671453).

Almost surely, 2^33640235641 is an apocalyptic number.

It is an amenable number.

33640235641 is a deficient number, since it is larger than the sum of its proper divisors (365135983).

33640235641 is a wasteful number, since it uses less digits than its factorization.

33640235641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 187131.

The product of its (nonzero) digits is 155520, while the sum is 37.

The spelling of 33640235641 in words is "thirty-three billion, six hundred forty million, two hundred thirty-five thousand, six hundred forty-one".