4878578691 has 24 divisors (see below), whose sum is σ = 8403682560. Its totient is φ = 2666551536.

The previous prime is 4878578671. The next prime is 4878578713. The reversal of 4878578691 is 1968758784.

4878578691 is a `hidden beast` number, since 487 + 85 + 78 + 6 + 9 + 1 = 666.

It is not a de Polignac number, because 4878578691 - 2¹⁰ = 4878577667 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (4878578641) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1681981 + ... + 1684878.

It is an arithmetic number, because the mean of its divisors is an integer number (350153440).

Almost surely, 2^4878578691 is an apocalyptic number.

4878578691 is a deficient number, since it is larger than the sum of its proper divisors (3525103869).

4878578691 is a wasteful number, since it uses less digits than its factorization.

4878578691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3366895 (or 3366892 counting only the distinct ones).

The product of its digits is 27095040, while the sum is 63.

The square root of 4878578691 is about 69846.8230558842. The cubic root of 4878578691 is about 1696.0205293504.

The spelling of 4878578691 in words is "four billion, eight hundred seventy-eight million, five hundred seventy-eight thousand, six hundred ninety-one".