4894261681 has 3 divisors (see below), whose sum is σ = 4894331641. Its totient is φ = 4894191722.

The previous prime is 4894261667. The next prime is 4894261693. The reversal of 4894261681 is 1861624984.

It is a happy number.

The square root of 4894261681 is 69959.

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

4894261681 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is not a de Polignac number, because 4894261681 - 2¹³ = 4894253489 is a prime.

It is a super-2 number, since 2×4894261681² = 47907594804209891522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4894261651) by changing a digit.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 34980 + ... + 104938.

Almost surely, 2^4894261681 is an apocalyptic number.

4894261681 is the 69959-th square number.

4894261681 is the 34980-th centered octagonal number.

It is an amenable number.

4894261681 is a deficient number, since it is larger than the sum of its proper divisors (69960).

4894261681 is an frugal number, since it uses more digits than its factorization.

4894261681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139918 (or 69959 counting only the distinct ones).

The product of its digits is 663552, while the sum is 49.

The cubic root of 4894261681 is about 1697.8359639642.

Multiplying 4894261681 by its sum of digits (49), we get a square (239818822369 = 489713²).

The spelling of 4894261681 in words is "four billion, eight hundred ninety-four million, two hundred sixty-one thousand, six hundred eighty-one".