6378780733 has 16 divisors (see below), whose sum is σ = 7024953600. Its totient is φ = 5755156416.

The previous prime is 6378780721. The next prime is 6378780743. The reversal of 6378780733 is 3370878736.

It is a happy number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-6378780733 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6378780703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 480418 + ... + 493516.

It is an arithmetic number, because the mean of its divisors is an integer number (439059600).

Almost surely, 2^6378780733 is an apocalyptic number.

It is an amenable number.

6378780733 is a deficient number, since it is larger than the sum of its proper divisors (646172867).

6378780733 is a wasteful number, since it uses less digits than its factorization.

6378780733 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13956.

The product of its (nonzero) digits is 3556224, while the sum is 52.

The square root of 6378780733 is about 79867.2694725443. The cubic root of 6378780733 is about 1854.5813633796.

The spelling of 6378780733 in words is "six billion, three hundred seventy-eight million, seven hundred eighty thousand, seven hundred thirty-three".