33864537381 has 8 divisors (see below), whose sum is σ = 45187914720. Its totient is φ = 22558759152.

The previous prime is 33864537367. The next prime is 33864537397. The reversal of 33864537381 is 18373546833.

It is a happy number.

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

It is not a de Polignac number, because 33864537381 - 2¹⁴ = 33864520997 is a prime.

It is a super-2 number, since 2×33864537381² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33864537341) 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, 4395286 + ... + 4402983.

It is an arithmetic number, because the mean of its divisors is an integer number (5648489340).

Almost surely, 2^33864537381 is an apocalyptic number.

It is an amenable number.

33864537381 is a deficient number, since it is larger than the sum of its proper divisors (11323377339).

33864537381 is a wasteful number, since it uses less digits than its factorization.

33864537381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8799555.

The product of its digits is 4354560, while the sum is 51.

The spelling of 33864537381 in words is "thirty-three billion, eight hundred sixty-four million, five hundred thirty-seven thousand, three hundred eighty-one".