7878908544 has 128 divisors (see below), whose sum is σ = 23018446080. Its totient is φ = 2372628480.

The previous prime is 7878908539. The next prime is 7878908561. The reversal of 7878908544 is 4458098787.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 217834 + ... + 251414.

It is an arithmetic number, because the mean of its divisors is an integer number (179831610).

Almost surely, 2^7878908544 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7878908544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11509223040).

7878908544 is an abundant number, since it is smaller than the sum of its proper divisors (15139537536).

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

7878908544 is a wasteful number, since it uses less digits than its factorization.

7878908544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33658 (or 33646 counting only the distinct ones).

The product of its (nonzero) digits is 18063360, while the sum is 60.

The square root of 7878908544 is about 88763.2161652562. The cubic root of 7878908544 is about 1989.8576991417.

The spelling of 7878908544 in words is "seven billion, eight hundred seventy-eight million, nine hundred eight thousand, five hundred forty-four".