4807138581 has 18 divisors (see below), whose sum is σ = 8077301622. Its totient is φ = 2746936080.

The previous prime is 4807138561. The next prime is 4807138613. The reversal of 4807138581 is 1858317084.

It is a happy number.

4807138581 is a `hidden beast` number, since 480 + 7 + 13 + 85 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2443720356 + 2363418225 = 49434^2 + 48615^2 .

It is not a de Polignac number, because 4807138581 - 2¹⁷ = 4807007509 is a prime.

It is a super-3 number, since 3×4807138581³ (a number of 30 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4807138561) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 5449830 + ... + 5450711.

It is an arithmetic number, because the mean of its divisors is an integer number (448738979).

Almost surely, 2^4807138581 is an apocalyptic number.

It is an amenable number.

4807138581 is a deficient number, since it is larger than the sum of its proper divisors (3270163041).

4807138581 is a wasteful number, since it uses less digits than its factorization.

4807138581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10900561 (or 10900551 counting only the distinct ones).

The product of its (nonzero) digits is 215040, while the sum is 45.

The square root of 4807138581 is about 69333.5314332106. The cubic root of 4807138581 is about 1687.7011542267.

The spelling of 4807138581 in words is "four billion, eight hundred seven million, one hundred thirty-eight thousand, five hundred eighty-one".