11351400505 has 4 divisors (see below), whose sum is σ = 13621680612. Its totient is φ = 9081120400.

The previous prime is 11351400503. The next prime is 11351400509. The reversal of 11351400505 is 50500415311.

It is a happy number.

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 8112424761 + 3238975744 = 90069^2 + 56912^2 .

It is not a de Polignac number, because 11351400505 - 2¹ = 11351400503 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 11351400505.

It is not an unprimeable number, because it can be changed into a prime (11351400503) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1135140046 + ... + 1135140055.

It is an arithmetic number, because the mean of its divisors is an integer number (3405420153).

Almost surely, 2^11351400505 is an apocalyptic number.

It is an amenable number.

11351400505 is a deficient number, since it is larger than the sum of its proper divisors (2270280107).

11351400505 is an equidigital number, since it uses as much as digits as its factorization.

11351400505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2270280106.

The product of its (nonzero) digits is 1500, while the sum is 25.

Adding to 11351400505 its reverse (50500415311), we get a palindrome (61851815816).

The spelling of 11351400505 in words is "eleven billion, three hundred fifty-one million, four hundred thousand, five hundred five".