11272278857 has 4 divisors (see below), whose sum is σ = 12882604416. Its totient is φ = 9661953300.

The previous prime is 11272278851. The next prime is 11272278883. The reversal of 11272278857 is 75887227211.

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 not a de Polignac number, because 11272278857 - 2⁸ = 11272278601 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11272278851) 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, 805162769 + ... + 805162782.

It is an arithmetic number, because the mean of its divisors is an integer number (3220651104).

Almost surely, 2^11272278857 is an apocalyptic number.

It is an amenable number.

11272278857 is a deficient number, since it is larger than the sum of its proper divisors (1610325559).

11272278857 is an equidigital number, since it uses as much as digits as its factorization.

11272278857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1610325558.

The product of its digits is 878080, while the sum is 50.

The spelling of 11272278857 in words is "eleven billion, two hundred seventy-two million, two hundred seventy-eight thousand, eight hundred fifty-seven".