4989815977 has 2 divisors, whose sum is σ = 4989815978. Its totient is φ = 4989815976.

The previous prime is 4989815953. The next prime is 4989816011. The reversal of 4989815977 is 7795189894.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 4314387856 + 675428121 = 65684^2 + 25989^2 .

It is a cyclic number.

It is not a de Polignac number, because 4989815977 - 2⁷ = 4989815849 is a prime.

It is not a weakly prime, because it can be changed into another prime (4989815947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2494907988 + 2494907989.

It is an arithmetic number, because the mean of its divisors is an integer number (2494907989).

Almost surely, 2^4989815977 is an apocalyptic number.

It is an amenable number.

4989815977 is a deficient number, since it is larger than the sum of its proper divisors (1).

4989815977 is an equidigital number, since it uses as much as digits as its factorization.

4989815977 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 45722880, while the sum is 67.

The square root of 4989815977 is about 70638.6294954821. The cubic root of 4989815977 is about 1708.8141952744.

The spelling of 4989815977 in words is "four billion, nine hundred eighty-nine million, eight hundred fifteen thousand, nine hundred seventy-seven".