4978978049 has 8 divisors (see below), whose sum is σ = 5101344360. Its totient is φ = 4856656000.

The previous prime is 4978978033. The next prime is 4978978057. The reversal of 4978978049 is 9408798794.

It can be written as a sum of positive squares in 4 ways, for example, as 46444225 + 4932533824 = 6815^2 + 70232^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 4978978049 - 2⁴ = 4978978033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4978978009) 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, 416447 + ... + 428235.

It is an arithmetic number, because the mean of its divisors is an integer number (637668045).

Almost surely, 2^4978978049 is an apocalyptic number.

It is an amenable number.

4978978049 is a deficient number, since it is larger than the sum of its proper divisors (122366311).

4978978049 is a wasteful number, since it uses less digits than its factorization.

4978978049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22131.

The product of its (nonzero) digits is 36578304, while the sum is 65.

The square root of 4978978049 is about 70561.8739051054. The cubic root of 4978978049 is about 1707.5761115425.

The spelling of 4978978049 in words is "four billion, nine hundred seventy-eight million, nine hundred seventy-eight thousand, forty-nine".