33939940647 has 8 divisors (see below), whose sum is σ = 45328553200. Its totient is φ = 22588977600.

The previous prime is 33939940633. The next prime is 33939940651. The reversal of 33939940647 is 74604993933.

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

It is not a de Polignac number, because 33939940647 - 2⁴ = 33939940631 is a prime.

It is a super-2 number, since 2×33939940647² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33939940607) 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, 9410272 + ... + 9413877.

It is an arithmetic number, because the mean of its divisors is an integer number (5666069150).

Almost surely, 2^33939940647 is an apocalyptic number.

33939940647 is a deficient number, since it is larger than the sum of its proper divisors (11388612553).

33939940647 is a wasteful number, since it uses less digits than its factorization.

33939940647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18824753.

The product of its (nonzero) digits is 13226976, while the sum is 57.

The spelling of 33939940647 in words is "thirty-three billion, nine hundred thirty-nine million, nine hundred forty thousand, six hundred forty-seven".