11500542257 has 2 divisors, whose sum is σ = 11500542258. Its totient is φ = 11500542256.

The previous prime is 11500542247. The next prime is 11500542259. The reversal of 11500542257 is 75224500511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 8043219856 + 3457322401 = 89684^2 + 58799^2 .

It is a cyclic number.

It is not a de Polignac number, because 11500542257 - 2⁴ = 11500542241 is a prime.

Together with 11500542259, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (11500542259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5750271128 + 5750271129.

It is an arithmetic number, because the mean of its divisors is an integer number (5750271129).

Almost surely, 2^11500542257 is an apocalyptic number.

It is an amenable number.

11500542257 is a deficient number, since it is larger than the sum of its proper divisors (1).

11500542257 is an equidigital number, since it uses as much as digits as its factorization.

11500542257 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 14000, while the sum is 32.

The spelling of 11500542257 in words is "eleven billion, five hundred million, five hundred forty-two thousand, two hundred fifty-seven".