4939925581 has 8 divisors (see below), whose sum is σ = 4963495680. Its totient is φ = 4916392272.

The previous prime is 4939925561. The next prime is 4939925591. The reversal of 4939925581 is 1855299394.

4939925581 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4939925581 - 2²¹ = 4937828429 is a prime.

It is a super-2 number, since 2×4939925581² = 48805729491636375122, 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 (4939925531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 281575 + ... + 298603.

It is an arithmetic number, because the mean of its divisors is an integer number (620436960).

Almost surely, 2^4939925581 is an apocalyptic number.

It is an amenable number.

4939925581 is a deficient number, since it is larger than the sum of its proper divisors (23570099).

4939925581 is a wasteful number, since it uses less digits than its factorization.

4939925581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18395.

The product of its digits is 3499200, while the sum is 55.

The square root of 4939925581 is about 70284.6041533991. The cubic root of 4939925581 is about 1703.0999471605.

The spelling of 4939925581 in words is "four billion, nine hundred thirty-nine million, nine hundred twenty-five thousand, five hundred eighty-one".