11146157281 has 4 divisors (see below), whose sum is σ = 12738465472. Its totient is φ = 9553849092.

The previous prime is 11146157263. The next prime is 11146157299. The reversal of 11146157281 is 18275164111.

11146157281 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 an interprime number because it is at equal distance from previous prime (11146157263) and next prime (11146157299).

It is a cyclic number.

It is not a de Polignac number, because 11146157281 - 2⁵ = 11146157249 is a prime.

It is a super-2 number, since 2×11146157281² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11146157281.

It is not an unprimeable number, because it can be changed into a prime (11146157201) 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 3 ways as a sum of consecutive naturals, for example, 796154085 + ... + 796154098.

It is an arithmetic number, because the mean of its divisors is an integer number (3184616368).

Almost surely, 2^11146157281 is an apocalyptic number.

It is an amenable number.

11146157281 is a deficient number, since it is larger than the sum of its proper divisors (1592308191).

11146157281 is an equidigital number, since it uses as much as digits as its factorization.

11146157281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1592308190.

The product of its digits is 13440, while the sum is 37.

The spelling of 11146157281 in words is "eleven billion, one hundred forty-six million, one hundred fifty-seven thousand, two hundred eighty-one".