4921978848 has 24 divisors (see below), whose sum is σ = 12920194728. Its totient is φ = 1640659584.

The previous prime is 4921978843. The next prime is 4921978849. The reversal of 4921978848 is 8488791294.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (24).

It is a junction number, because it is equal to n+sod(n) for n = 4921978791 and 4921978800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4921978843) 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 3 ways as a sum of consecutive naturals, for example, 25635211 + ... + 25635402.

It is an arithmetic number, because the mean of its divisors is an integer number (538341447).

Almost surely, 2^4921978848 is an apocalyptic number.

4921978848 is a gapful number since it is divisible by the number (48) formed by its first and last digit.

It is an amenable number.

4921978848 is an abundant number, since it is smaller than the sum of its proper divisors (7998215880).

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

4921978848 is a wasteful number, since it uses less digits than its factorization.

4921978848 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 51270626 (or 51270618 counting only the distinct ones).

The product of its digits is 9289728, while the sum is 60.

The square root of 4921978848 is about 70156.8161193194. The cubic root of 4921978848 is about 1701.0349923558.

The spelling of 4921978848 in words is "four billion, nine hundred twenty-one million, nine hundred seventy-eight thousand, eight hundred forty-eight".