11051551409 has 2 divisors, whose sum is σ = 11051551410. Its totient is φ = 11051551408.

The previous prime is 11051551339. The next prime is 11051551481. The reversal of 11051551409 is 90415515011.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 6376821025 + 4674730384 = 79855^2 + 68372^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11051551409 is a prime.

It is not a weakly prime, because it can be changed into another prime (11050551409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5525775704 + 5525775705.

It is an arithmetic number, because the mean of its divisors is an integer number (5525775705).

Almost surely, 2^11051551409 is an apocalyptic number.

It is an amenable number.

11051551409 is a deficient number, since it is larger than the sum of its proper divisors (1).

11051551409 is an equidigital number, since it uses as much as digits as its factorization.

11051551409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 11051551409 in words is "eleven billion, fifty-one million, five hundred fifty-one thousand, four hundred nine".