4644681381 has 12 divisors (see below), whose sum is σ = 6713103852. Its totient is φ = 3094552896.

The previous prime is 4644681343. The next prime is 4644681443. The reversal of 4644681381 is 1831864464.

It can be written as a sum of positive squares in 2 ways, for example, as 1580062500 + 3064618881 = 39750^2 + 55359^2 .

It is not a de Polignac number, because 4644681381 - 2¹⁰ = 4644680357 is a prime.

It is a super-2 number, since 2×4644681381² = 43146130262016134322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4644689381) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 142896 + ... + 172361.

It is an arithmetic number, because the mean of its divisors is an integer number (559425321).

Almost surely, 2^4644681381 is an apocalyptic number.

It is an amenable number.

4644681381 is a deficient number, since it is larger than the sum of its proper divisors (2068422471).

4644681381 is a wasteful number, since it uses less digits than its factorization.

4644681381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316900 (or 316897 counting only the distinct ones).

The product of its digits is 442368, while the sum is 45.

The square root of 4644681381 is about 68151.8993205619. The cubic root of 4644681381 is about 1668.4709229219.

The spelling of 4644681381 in words is "four billion, six hundred forty-four million, six hundred eighty-one thousand, three hundred eighty-one".