4938618581 has 16 divisors (see below), whose sum is σ = 5555303040. Its totient is φ = 4356158400.

The previous prime is 4938618571. The next prime is 4938618611. The reversal of 4938618581 is 1858168394.

It is a cyclic number.

It is not a de Polignac number, because 4938618581 - 2¹⁰ = 4938617557 is a prime.

It is a super-2 number, since 2×4938618581² = 48779906977196907122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4938618571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 311906 + ... + 327356.

It is an arithmetic number, because the mean of its divisors is an integer number (347206440).

Almost surely, 2^4938618581 is an apocalyptic number.

It is an amenable number.

4938618581 is a deficient number, since it is larger than the sum of its proper divisors (616684459).

4938618581 is a wasteful number, since it uses less digits than its factorization.

4938618581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16556.

The product of its digits is 1658880, while the sum is 53.

The square root of 4938618581 is about 70275.3056272258. The cubic root of 4938618581 is about 1702.9497324837.

The spelling of 4938618581 in words is "four billion, nine hundred thirty-eight million, six hundred eighteen thousand, five hundred eighty-one".