7781341113378 has 64 divisors (see below), whose sum is σ = 19771283139840. Its totient is φ = 2222211283200.

The previous prime is 7781341113373. The next prime is 7781341113473. The reversal of 7781341113378 is 8733111431877.

7781341113378 is a `hidden beast` number, since 77 + 81 + 3 + 411 + 13 + 3 + 78 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (7781341113373) 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 31 ways as a sum of consecutive naturals, for example, 3946113 + ... + 5579828.

It is an arithmetic number, because the mean of its divisors is an integer number (308926299060).

Almost surely, 2^{7781341113378} is an apocalyptic number.

7781341113378 is an abundant number, since it is smaller than the sum of its proper divisors (11989942026462).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

7781341113378 is a wasteful number, since it uses less digits than its factorization.

7781341113378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9528120 (or 9528114 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The spelling of 7781341113378 in words is "seven trillion, seven hundred eighty-one billion, three hundred forty-one million, one hundred thirteen thousand, three hundred seventy-eight".