11156664251 has 4 divisors (see below), whose sum is σ = 11158267104. Its totient is φ = 11155061400.

The previous prime is 11156664217. The next prime is 11156664289. The reversal of 11156664251 is 15246665111.

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

It is a cyclic number.

It is not a de Polignac number, because 11156664251 - 2⁶ = 11156664187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11156664751) 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, 790940 + ... + 804921.

It is an arithmetic number, because the mean of its divisors is an integer number (2789566776).

Almost surely, 2^11156664251 is an apocalyptic number.

11156664251 is a deficient number, since it is larger than the sum of its proper divisors (1602853).

11156664251 is an equidigital number, since it uses as much as digits as its factorization.

11156664251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1602852.

The product of its digits is 43200, while the sum is 38.

The spelling of 11156664251 in words is "eleven billion, one hundred fifty-six million, six hundred sixty-four thousand, two hundred fifty-one".