11550515051 has 4 divisors (see below), whose sum is σ = 11560198152. Its totient is φ = 11540831952.

The previous prime is 11550515023. The next prime is 11550515057. The reversal of 11550515051 is 15051505511.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11550515051 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11550515057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4839761 + ... + 4842146.

It is an arithmetic number, because the mean of its divisors is an integer number (2890049538).

Almost surely, 2^11550515051 is an apocalyptic number.

11550515051 is a deficient number, since it is larger than the sum of its proper divisors (9683101).

11550515051 is an equidigital number, since it uses as much as digits as its factorization.

11550515051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9683100.

The product of its (nonzero) digits is 3125, while the sum is 29.

The spelling of 11550515051 in words is "eleven billion, five hundred fifty million, five hundred fifteen thousand, fifty-one".