7783778378 has 8 divisors (see below), whose sum is σ = 11684604672. Its totient is φ = 3888910156.

The previous prime is 7783778371. The next prime is 7783778411. The reversal of 7783778378 is 8738773877.

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

It is a super-3 number, since 3×7783778378³ (a number of 31 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (7783778371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1486250 + ... + 1491477.

It is an arithmetic number, because the mean of its divisors is an integer number (1460575584).

Almost surely, 2^7783778378 is an apocalyptic number.

7783778378 is a deficient number, since it is larger than the sum of its proper divisors (3900826294).

7783778378 is a wasteful number, since it uses less digits than its factorization.

7783778378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2979036.

The product of its digits is 77446656, while the sum is 65.

The square root of 7783778378 is about 88225.7240151646. The cubic root of 7783778378 is about 1981.8167166000.

The spelling of 7783778378 in words is "seven billion, seven hundred eighty-three million, seven hundred seventy-eight thousand, three hundred seventy-eight".