7878553948 has 12 divisors (see below), whose sum is σ = 13791212680. Its totient is φ = 3938207472.

The previous prime is 7878553909. The next prime is 7878553961. The reversal of 7878553948 is 8493558787.

It is a happy number.

It is a super-2 number, since 2×7878553948² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 7878553948.

It is a congruent number.

It is an unprimeable number.

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, 250686 + ... + 280357.

Almost surely, 2^7878553948 is an apocalyptic number.

It is an amenable number.

7878553948 is a deficient number, since it is larger than the sum of its proper divisors (5912658732).

7878553948 is a wasteful number, since it uses less digits than its factorization.

7878553948 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 534756 (or 534754 counting only the distinct ones).

The product of its digits is 67737600, while the sum is 64.

The square root of 7878553948 is about 88761.2187162840. The cubic root of 7878553948 is about 1989.8278470303.

The spelling of 7878553948 in words is "seven billion, eight hundred seventy-eight million, five hundred fifty-three thousand, nine hundred forty-eight".