11515262557 has 2 divisors, whose sum is σ = 11515262558. Its totient is φ = 11515262556.

The previous prime is 11515262491. The next prime is 11515262611. The reversal of 11515262557 is 75526251511.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11401754841 + 113507716 = 106779^2 + 10654^2 .

It is a cyclic number.

It is not a de Polignac number, because 11515262557 - 2¹⁹ = 11514738269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11515262657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5757631278 + 5757631279.

It is an arithmetic number, because the mean of its divisors is an integer number (5757631279).

Almost surely, 2^11515262557 is an apocalyptic number.

It is an amenable number.

11515262557 is a deficient number, since it is larger than the sum of its proper divisors (1).

11515262557 is an equidigital number, since it uses as much as digits as its factorization.

11515262557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105000, while the sum is 40.

The spelling of 11515262557 in words is "eleven billion, five hundred fifteen million, two hundred sixty-two thousand, five hundred fifty-seven".