11525123513 has 2 divisors, whose sum is σ = 11525123514. Its totient is φ = 11525123512.

The previous prime is 11525123483. The next prime is 11525123581. The reversal of 11525123513 is 31532152511.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10963765264 + 561358249 = 104708^2 + 23693^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11525123513 is a prime.

It is a super-2 number, since 2×11525123513² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (11525123213) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5762561756 + 5762561757.

It is an arithmetic number, because the mean of its divisors is an integer number (5762561757).

Almost surely, 2^11525123513 is an apocalyptic number.

It is an amenable number.

11525123513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11525123513 is an equidigital number, since it uses as much as digits as its factorization.

11525123513 is an evil number, because the sum of its binary digits is even.

The product of its digits is 4500, while the sum is 29.

The spelling of 11525123513 in words is "eleven billion, five hundred twenty-five million, one hundred twenty-three thousand, five hundred thirteen".