4994107561 has 9 divisors (see below), whose sum is σ = 5306435749. Its totient is φ = 4699205824.

The previous prime is 4994107537. The next prime is 4994107583. The reversal of 4994107561 is 1657014994.

The square root of 4994107561 is 70669.

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

It can be written as a sum of positive squares in 4 ways, for example, as 307335961 + 4686771600 = 17531^2 + 68460^2 .

It is not a de Polignac number, because 4994107561 - 2¹¹ = 4994105513 is a prime.

It is a super-2 number, since 2×4994107561² = 49882220661674737442, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4994107501) 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 8 ways as a sum of consecutive naturals, for example, 1199295 + ... + 1203451.

Almost surely, 2^4994107561 is an apocalyptic number.

4994107561 is the 70669-th square number.

4994107561 is the 35335-th centered octagonal number.

It is an amenable number.

4994107561 is a deficient number, since it is larger than the sum of its proper divisors (312328188).

4994107561 is an frugal number, since it uses more digits than its factorization.

4994107561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8348 (or 4174 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 46.

The cubic root of 4994107561 is about 1709.3039540320.

The spelling of 4994107561 in words is "four billion, nine hundred ninety-four million, one hundred seven thousand, five hundred sixty-one".