4949149581 has 24 divisors (see below), whose sum is σ = 7268203800. Its totient is φ = 3244752000.

The previous prime is 4949149571. The next prime is 4949149631. The reversal of 4949149581 is 1859419494.

4949149581 is a `hidden beast` number, since 4 + 9 + 49 + 14 + 9 + 581 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 2301120900 + 2648028681 = 47970^2 + 51459^2 .

It is not a de Polignac number, because 4949149581 - 2⁵ = 4949149549 is a prime.

It is a super-2 number, since 2×4949149581² = 48988163150224951122, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4949149561) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 117171 + ... + 153711.

It is an arithmetic number, because the mean of its divisors is an integer number (302841825).

Almost surely, 2^4949149581 is an apocalyptic number.

It is an amenable number.

4949149581 is a deficient number, since it is larger than the sum of its proper divisors (2319054219).

4949149581 is a wasteful number, since it uses less digits than its factorization.

4949149581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36797 (or 36794 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 4949149581 is about 70350.1924730843. The cubic root of 4949149581 is about 1704.1593171231.

The spelling of 4949149581 in words is "four billion, nine hundred forty-nine million, one hundred forty-nine thousand, five hundred eighty-one".