11325513661 has 16 divisors (see below), whose sum is σ = 14386543488. Its totient is φ = 8658561600.

The previous prime is 11325513613. The next prime is 11325513721. The reversal of 11325513661 is 16631552311.

It is a cyclic number.

It is not a de Polignac number, because 11325513661 - 2⁹ = 11325513149 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11325513601) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1383510 + ... + 1391671.

It is an arithmetic number, because the mean of its divisors is an integer number (899158968).

Almost surely, 2^11325513661 is an apocalyptic number.

11325513661 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11325513661 is a deficient number, since it is larger than the sum of its proper divisors (3061029827).

11325513661 is a wasteful number, since it uses less digits than its factorization.

11325513661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2775252.

The product of its digits is 16200, while the sum is 34.

The spelling of 11325513661 in words is "eleven billion, three hundred twenty-five million, five hundred thirteen thousand, six hundred sixty-one".