4791978321 has 8 divisors (see below), whose sum is σ = 6880789440. Its totient is φ = 2948909712.

The previous prime is 4791978293. The next prime is 4791978341. The reversal of 4791978321 is 1238791974.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 4791978321 - 2¹⁵ = 4791945553 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4791978341) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61435581 + ... + 61435658.

It is an arithmetic number, because the mean of its divisors is an integer number (860098680).

Almost surely, 2^4791978321 is an apocalyptic number.

It is an amenable number.

4791978321 is a deficient number, since it is larger than the sum of its proper divisors (2088811119).

4791978321 is a wasteful number, since it uses less digits than its factorization.

4791978321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122871255.

The product of its digits is 762048, while the sum is 51.

The square root of 4791978321 is about 69224.1166140818. The cubic root of 4791978321 is about 1685.9251196957.

The spelling of 4791978321 in words is "four billion, seven hundred ninety-one million, nine hundred seventy-eight thousand, three hundred twenty-one".