11051038581 has 32 divisors (see below), whose sum is σ = 17027750016. Its totient is φ = 6300672000.

The previous prime is 11051038567. The next prime is 11051038591. The reversal of 11051038581 is 18583015011.

It is not a de Polignac number, because 11051038581 - 2¹¹ = 11051036533 is a prime.

It is a super-2 number, since 2×11051038581² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11051038511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1882591 + ... + 1888451.

It is an arithmetic number, because the mean of its divisors is an integer number (532117188).

Almost surely, 2^11051038581 is an apocalyptic number.

11051038581 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

11051038581 is a deficient number, since it is larger than the sum of its proper divisors (5976711435).

11051038581 is a wasteful number, since it uses less digits than its factorization.

11051038581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9253.

The product of its (nonzero) digits is 4800, while the sum is 33.

The spelling of 11051038581 in words is "eleven billion, fifty-one million, thirty-eight thousand, five hundred eighty-one".