11051551361 has 4 divisors (see below), whose sum is σ = 11260071252. Its totient is φ = 10843031472.

The previous prime is 11051551339. The next prime is 11051551409. The reversal of 11051551361 is 16315515011.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 5511577600 + 5539973761 = 74240^2 + 74431^2 .

It is a cyclic number.

It is not a de Polignac number, because 11051551361 - 2¹⁰ = 11051550337 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11051551321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 104259866 + ... + 104259971.

It is an arithmetic number, because the mean of its divisors is an integer number (2815017813).

Almost surely, 2^11051551361 is an apocalyptic number.

It is an amenable number.

11051551361 is a deficient number, since it is larger than the sum of its proper divisors (208519891).

11051551361 is an equidigital number, since it uses as much as digits as its factorization.

11051551361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208519890.

The product of its (nonzero) digits is 2250, while the sum is 29.

The spelling of 11051551361 in words is "eleven billion, fifty-one million, five hundred fifty-one thousand, three hundred sixty-one".