4978371968 has 16 divisors (see below), whose sum is σ = 9917850660. Its totient is φ = 2489185920.

The previous prime is 4978371967. The next prime is 4978372013. The reversal of 4978371968 is 8691738794.

It is a tau number, because it is divible by the number of its divisors (16).

It is a self number, because there is not a number n which added to its sum of digits gives 4978371968.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4978371961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19446638 + ... + 19446893.

Almost surely, 2^4978371968 is an apocalyptic number.

It is an amenable number.

4978371968 is a deficient number, since it is larger than the sum of its proper divisors (4939478692).

4978371968 is an equidigital number, since it uses as much as digits as its factorization.

4978371968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38893545 (or 38893533 counting only the distinct ones).

The product of its digits is 18289152, while the sum is 62.

The square root of 4978371968 is about 70557.5790967916. The cubic root of 4978371968 is about 1707.5068221272.

The spelling of 4978371968 in words is "four billion, nine hundred seventy-eight million, three hundred seventy-one thousand, nine hundred sixty-eight".