6649781134382 has 8 divisors (see below), whose sum is σ = 10012598210736. Its totient is φ = 3312248397472.

The previous prime is 6649781134357. The next prime is 6649781134417. The reversal of 6649781134382 is 2834311879466.

It is a happy number.

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

It is a super-3 number, since 3×6649781134382³ (a number of 39 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6321084203 + ... + 6321085254.

It is an arithmetic number, because the mean of its divisors is an integer number (1251574776342).

Almost surely, 2^{6649781134382} is an apocalyptic number.

6649781134382 is a deficient number, since it is larger than the sum of its proper divisors (3362817076354).

6649781134382 is a wasteful number, since it uses less digits than its factorization.

6649781134382 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12642169722.

The product of its digits is 41803776, while the sum is 62.

The spelling of 6649781134382 in words is "six trillion, six hundred forty-nine billion, seven hundred eighty-one million, one hundred thirty-four thousand, three hundred eighty-two".