11261053551 has 64 divisors (see below), whose sum is σ = 17559060480. Its totient is φ = 6347859840.

The previous prime is 11261053549. The next prime is 11261053603. The reversal of 11261053551 is 15535016211.

It is not a de Polignac number, because 11261053551 - 2¹ = 11261053549 is a prime.

It is a super-2 number, since 2×11261053551² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11261053541) 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 63 ways as a sum of consecutive naturals, for example, 8201101 + ... + 8202473.

It is an arithmetic number, because the mean of its divisors is an integer number (274360320).

Almost surely, 2^11261053551 is an apocalyptic number.

11261053551 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

11261053551 is a deficient number, since it is larger than the sum of its proper divisors (6298006929).

11261053551 is a wasteful number, since it uses less digits than its factorization.

11261053551 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1636.

The product of its (nonzero) digits is 4500, while the sum is 30.

Adding to 11261053551 its reverse (15535016211), we get a palindrome (26796069762).

The spelling of 11261053551 in words is "eleven billion, two hundred sixty-one million, fifty-three thousand, five hundred fifty-one".