11615606551 has 2 divisors, whose sum is σ = 11615606552. Its totient is φ = 11615606550.

The previous prime is 11615606543. The next prime is 11615606683. The reversal of 11615606551 is 15560651611.

It is a weak prime.

It is an emirp because it is prime and its reverse (15560651611) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 11615606551 - 2³ = 11615606543 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11615606551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11615601551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5807803275 + 5807803276.

It is an arithmetic number, because the mean of its divisors is an integer number (5807803276).

Almost surely, 2^11615606551 is an apocalyptic number.

11615606551 is a deficient number, since it is larger than the sum of its proper divisors (1).

11615606551 is an equidigital number, since it uses as much as digits as its factorization.

11615606551 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 37.

The spelling of 11615606551 in words is "eleven billion, six hundred fifteen million, six hundred six thousand, five hundred fifty-one".