4989526781 has 16 divisors (see below), whose sum is σ = 5298077568. Its totient is φ = 4688798400.

The previous prime is 4989526777. The next prime is 4989526813. The reversal of 4989526781 is 1876259894.

It is not a de Polignac number, because 4989526781 - 2² = 4989526777 is a prime.

It is a super-2 number, since 2×4989526781² = 49790754996632443922, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4989526781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4989526081) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1641395 + ... + 1644431.

It is an arithmetic number, because the mean of its divisors is an integer number (331129848).

Almost surely, 2^4989526781 is an apocalyptic number.

It is an amenable number.

4989526781 is a deficient number, since it is larger than the sum of its proper divisors (308550787).

4989526781 is a wasteful number, since it uses less digits than its factorization.

4989526781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4292.

The product of its digits is 8709120, while the sum is 59.

The square root of 4989526781 is about 70636.5824555520. The cubic root of 4989526781 is about 1708.7811819142.

The spelling of 4989526781 in words is "four billion, nine hundred eighty-nine million, five hundred twenty-six thousand, seven hundred eighty-one".