7691886378 has 48 divisors (see below), whose sum is σ = 18478897632. Its totient is φ = 2292660000.

The previous prime is 7691886373. The next prime is 7691886401. The reversal of 7691886378 is 8736881967.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (7691886373) 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 23 ways as a sum of consecutive naturals, for example, 306348 + ... + 330503.

It is an arithmetic number, because the mean of its divisors is an integer number (384977034).

Almost surely, 2^7691886378 is an apocalyptic number.

7691886378 is an abundant number, since it is smaller than the sum of its proper divisors (10787011254).

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

7691886378 is a wasteful number, since it uses less digits than its factorization.

7691886378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636931 (or 636928 counting only the distinct ones).

The product of its digits is 24385536, while the sum is 63.

The square root of 7691886378 is about 87703.4000367147. The cubic root of 7691886378 is about 1973.9869934442.

The spelling of 7691886378 in words is "seven billion, six hundred ninety-one million, eight hundred eighty-six thousand, three hundred seventy-eight".