7538890621 has 8 divisors (see below), whose sum is σ = 7724518200. Its totient is φ = 7353346560.

The previous prime is 7538890603. The next prime is 7538890627. The reversal of 7538890621 is 1260988357.

7538890621 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 36905625 + 7501984996 = 6075^2 + 86614^2 .

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 7538890621 - 2¹¹ = 7538888573 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7538890627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187015 + ... + 223723.

It is an arithmetic number, because the mean of its divisors is an integer number (965564775).

Almost surely, 2^7538890621 is an apocalyptic number.

It is an amenable number.

7538890621 is a deficient number, since it is larger than the sum of its proper divisors (185627579).

7538890621 is a wasteful number, since it uses less digits than its factorization.

7538890621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41759.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 7538890621 is about 86826.7851587285. The cubic root of 7538890621 is about 1960.8113589513.

The spelling of 7538890621 in words is "seven billion, five hundred thirty-eight million, eight hundred ninety thousand, six hundred twenty-one".