11351400509 has 2 divisors, whose sum is σ = 11351400510. Its totient is φ = 11351400508.

The previous prime is 11351400503. The next prime is 11351400517. The reversal of 11351400509 is 90500415311.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10159632025 + 1191768484 = 100795^2 + 34522^2 .

It is a cyclic number.

It is not a de Polignac number, because 11351400509 - 2²⁰ = 11350351933 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (11351400503) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5675700254 + 5675700255.

It is an arithmetic number, because the mean of its divisors is an integer number (5675700255).

Almost surely, 2^11351400509 is an apocalyptic number.

It is an amenable number.

11351400509 is a deficient number, since it is larger than the sum of its proper divisors (1).

11351400509 is an equidigital number, since it uses as much as digits as its factorization.

11351400509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2700, while the sum is 29.

The spelling of 11351400509 in words is "eleven billion, three hundred fifty-one million, four hundred thousand, five hundred nine".