4989161956 has 9 divisors (see below), whose sum is σ = 8731280649. Its totient is φ = 2494510344.

The previous prime is 4989161941. The next prime is 4989161959. The reversal of 4989161956 is 6591619894.

The square root of 4989161956 is 70634.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 2547220900 + 2441941056 = 50470^2 + 49416^2 .

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 4989161956.

It is not an unprimeable number, because it can be changed into a prime (4989161959) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 123610 + ... + 158926.

Almost surely, 2^4989161956 is an apocalyptic number.

4989161956 is the 70634-th square number.

It is an amenable number.

4989161956 is a deficient number, since it is larger than the sum of its proper divisors (3742118693).

4989161956 is an frugal number, since it uses more digits than its factorization.

4989161956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70638 (or 35319 counting only the distinct ones).

The product of its digits is 4199040, while the sum is 58.

The cubic root of 4989161956 is about 1708.7395332558.

The spelling of 4989161956 in words is "four billion, nine hundred eighty-nine million, one hundred sixty-one thousand, nine hundred fifty-six".