11511122457 has 8 divisors (see below), whose sum is σ = 15558412384. Its totient is φ = 7568957088.

The previous prime is 11511122443. The next prime is 11511122471. The reversal of 11511122457 is 75422111511.

11511122457 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (11511122443) and next prime (11511122471).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 11511122457 - 2¹⁴ = 11511106073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11511122477) 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, 26280883 + ... + 26281320.

It is an arithmetic number, because the mean of its divisors is an integer number (1944801548).

Almost surely, 2^11511122457 is an apocalyptic number.

It is an amenable number.

11511122457 is a deficient number, since it is larger than the sum of its proper divisors (4047289927).

11511122457 is an equidigital number, since it uses as much as digits as its factorization.

11511122457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52562279.

The product of its digits is 2800, while the sum is 30.

Adding to 11511122457 its reverse (75422111511), we get a palindrome (86933233968).

The spelling of 11511122457 in words is "eleven billion, five hundred eleven million, one hundred twenty-two thousand, four hundred fifty-seven".