7438674581 has 8 divisors (see below), whose sum is σ = 8482108824. Its totient is φ = 6462558720.

The previous prime is 7438674517. The next prime is 7438674611. The reversal of 7438674581 is 1854768347.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 44222500 + 7394452081 = 6650^2 + 85991^2 .

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 7438674581 - 2⁶ = 7438674517 is a prime.

It is a super-2 number, since 2×7438674581² (a number of 21 digits) 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 (7438674281) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16829360 + ... + 16829801.

It is an arithmetic number, because the mean of its divisors is an integer number (1060263603).

Almost surely, 2^7438674581 is an apocalyptic number.

It is an amenable number.

7438674581 is a deficient number, since it is larger than the sum of its proper divisors (1043434243).

7438674581 is a wasteful number, since it uses less digits than its factorization.

7438674581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33659191.

The product of its digits is 4515840, while the sum is 53.

The square root of 7438674581 is about 86247.7511648855. The cubic root of 7438674581 is about 1952.0840817950.

The spelling of 7438674581 in words is "seven billion, four hundred thirty-eight million, six hundred seventy-four thousand, five hundred eighty-one".