11320550125581 has 16 divisors (see below), whose sum is σ = 15750453229056. Its totient is φ = 7218845328816.

The previous prime is 11320550125571. The next prime is 11320550125727. The reversal of 11320550125581 is 18552105502311.

It is not a de Polignac number, because 11320550125581 - 2⁹ = 11320550125069 is a prime.

It is a super-2 number, since 2×11320550125581² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11320550125561) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9430726 + ... + 10563128.

It is an arithmetic number, because the mean of its divisors is an integer number (984403326816).

Almost surely, 2^{11320550125581} is an apocalyptic number.

It is an amenable number.

11320550125581 is a deficient number, since it is larger than the sum of its proper divisors (4429903103475).

11320550125581 is a wasteful number, since it uses less digits than its factorization.

11320550125581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1277312.

The product of its (nonzero) digits is 60000, while the sum is 39.

Adding to 11320550125581 its reverse (18552105502311), we get a palindrome (29872655627892).

The spelling of 11320550125581 in words is "eleven trillion, three hundred twenty billion, five hundred fifty million, one hundred twenty-five thousand, five hundred eighty-one".