4891468981 has 4 divisors (see below), whose sum is σ = 5590250272. Its totient is φ = 4192687692.

The previous prime is 4891468979. The next prime is 4891468987. The reversal of 4891468981 is 1898641984.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 4891468981 - 2¹ = 4891468979 is a prime.

It is a super-2 number, since 2×4891468981² = 47852937584170356722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4891468987) 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 3 ways as a sum of consecutive naturals, for example, 349390635 + ... + 349390648.

It is an arithmetic number, because the mean of its divisors is an integer number (1397562568).

Almost surely, 2^4891468981 is an apocalyptic number.

It is an amenable number.

4891468981 is a deficient number, since it is larger than the sum of its proper divisors (698781291).

4891468981 is an equidigital number, since it uses as much as digits as its factorization.

4891468981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 698781290.

The product of its digits is 3981312, while the sum is 58.

The square root of 4891468981 is about 69939.0376041878. The cubic root of 4891468981 is about 1697.5129701573.

The spelling of 4891468981 in words is "four billion, eight hundred ninety-one million, four hundred sixty-eight thousand, nine hundred eighty-one".