2640137933 has 8 divisors (see below), whose sum is σ = 2650384320. Its totient is φ = 2629912320.

The previous prime is 2640137917. The next prime is 2640137939. The reversal of 2640137933 is 3397310462.

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 2640137933 - 2⁴ = 2640137917 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2640137939) 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, 278648 + ... + 287966.

It is an arithmetic number, because the mean of its divisors is an integer number (331298040).

Almost surely, 2^2640137933 is an apocalyptic number.

It is an amenable number.

2640137933 is a deficient number, since it is larger than the sum of its proper divisors (10246387).

2640137933 is an equidigital number, since it uses as much as digits as its factorization.

2640137933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10387.

The product of its (nonzero) digits is 81648, while the sum is 38.

The square root of 2640137933 is about 51382.2725558144. The cubic root of 2640137933 is about 1382.1087156691.

The spelling of 2640137933 in words is "two billion, six hundred forty million, one hundred thirty-seven thousand, nine hundred thirty-three".