7538272081 has 4 divisors (see below), whose sum is σ = 7546036464. Its totient is φ = 7530507700.

The previous prime is 7538272061. The next prime is 7538272109. The reversal of 7538272081 is 1802728357.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-7538272081 is a prime.

It is a super-2 number, since 2×7538272081² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (7538272061) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3880735 + ... + 3882676.

It is an arithmetic number, because the mean of its divisors is an integer number (1886509116).

Almost surely, 2^7538272081 is an apocalyptic number.

It is an amenable number.

7538272081 is a deficient number, since it is larger than the sum of its proper divisors (7764383).

7538272081 is an equidigital number, since it uses as much as digits as its factorization.

7538272081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7764382.

The product of its (nonzero) digits is 188160, while the sum is 43.

The square root of 7538272081 is about 86823.2231663856. The cubic root of 7538272081 is about 1960.7577315460.

The spelling of 7538272081 in words is "seven billion, five hundred thirty-eight million, two hundred seventy-two thousand, eighty-one".