11605256513 has 2 divisors, whose sum is σ = 11605256514. Its totient is φ = 11605256512.

The previous prime is 11605256491. The next prime is 11605256519. The reversal of 11605256513 is 31565250611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7316578369 + 4288678144 = 85537^2 + 65488^2 .

It is a cyclic number.

It is not a de Polignac number, because 11605256513 - 2¹⁶ = 11605190977 is a prime.

It is not a weakly prime, because it can be changed into another prime (11605256519) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5802628256 + 5802628257.

It is an arithmetic number, because the mean of its divisors is an integer number (5802628257).

Almost surely, 2^11605256513 is an apocalyptic number.

It is an amenable number.

11605256513 is a deficient number, since it is larger than the sum of its proper divisors (1).

11605256513 is an equidigital number, since it uses as much as digits as its factorization.

11605256513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27000, while the sum is 35.

The spelling of 11605256513 in words is "eleven billion, six hundred five million, two hundred fifty-six thousand, five hundred thirteen".