4989721918 has 16 divisors (see below), whose sum is σ = 7954110144. Its totient is φ = 2339435520.

The previous prime is 4989721909. The next prime is 4989721927. The reversal of 4989721918 is 8191279894.

It is an interprime number because it is at equal distance from previous prime (4989721909) and next prime (4989721927).

It is a super-3 number, since 3×4989721918³ (a number of 30 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 261555 + ... + 279982.

It is an arithmetic number, because the mean of its divisors is an integer number (497131884).

Almost surely, 2^4989721918 is an apocalyptic number.

4989721918 is a deficient number, since it is larger than the sum of its proper divisors (2964388226).

4989721918 is a wasteful number, since it uses less digits than its factorization.

4989721918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541827.

The product of its digits is 2612736, while the sum is 58.

The square root of 4989721918 is about 70637.9637164039. The cubic root of 4989721918 is about 1708.8034580472.

The spelling of 4989721918 in words is "four billion, nine hundred eighty-nine million, seven hundred twenty-one thousand, nine hundred eighteen".