11550431425 has 12 divisors (see below), whose sum is σ = 15424268860. Its totient is φ = 8529549120.

The previous prime is 11550431393. The next prime is 11550431437. The reversal of 11550431425 is 52413405511.

It can be written as a sum of positive squares in 6 ways, for example, as 5143824 + 11545287601 = 2268^2 + 107449^2 .

It is not a de Polignac number, because 11550431425 - 2⁵ = 11550431393 is a prime.

It is a super-4 number, since 4×11550431425⁴ (a number of 41 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 17769570 + ... + 17770219.

Almost surely, 2^11550431425 is an apocalyptic number.

It is an amenable number.

11550431425 is a deficient number, since it is larger than the sum of its proper divisors (3873837435).

11550431425 is a wasteful number, since it uses less digits than its factorization.

11550431425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35539812 (or 35539807 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 31.

Adding to 11550431425 its reverse (52413405511), we get a palindrome (63963836936).

The spelling of 11550431425 in words is "eleven billion, five hundred fifty million, four hundred thirty-one thousand, four hundred twenty-five".