11643051051 has 20 divisors (see below), whose sum is σ = 17992458000. Its totient is φ = 7494376176.

The previous prime is 11643051019. The next prime is 11643051061. The reversal of 11643051051 is 15015034611.

11643051051 is a `hidden beast` number, since 1 + 1 + 643 + 0 + 5 + 10 + 5 + 1 = 666.

It is not a de Polignac number, because 11643051051 - 2⁵ = 11643051019 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (11643051011) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2475951 + ... + 2480648.

It is an arithmetic number, because the mean of its divisors is an integer number (899622900).

Almost surely, 2^11643051051 is an apocalyptic number.

11643051051 is a deficient number, since it is larger than the sum of its proper divisors (6349406949).

11643051051 is an equidigital number, since it uses as much as digits as its factorization.

11643051051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4956640 (or 4956631 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 27.

Adding to 11643051051 its reverse (15015034611), we get a palindrome (26658085662).

The spelling of 11643051051 in words is "eleven billion, six hundred forty-three million, fifty-one thousand, fifty-one".