11166501551 has 4 divisors (see below), whose sum is σ = 11182851432. Its totient is φ = 11150151672.

The previous prime is 11166501547. The next prime is 11166501631. The reversal of 11166501551 is 15510566111.

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 11166501551 - 2² = 11166501547 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11166501851) 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, 8173916 + ... + 8175281.

It is an arithmetic number, because the mean of its divisors is an integer number (2795712858).

Almost surely, 2^11166501551 is an apocalyptic number.

11166501551 is a deficient number, since it is larger than the sum of its proper divisors (16349881).

11166501551 is an equidigital number, since it uses as much as digits as its factorization.

11166501551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16349880.

The product of its (nonzero) digits is 4500, while the sum is 32.

The spelling of 11166501551 in words is "eleven billion, one hundred sixty-six million, five hundred one thousand, five hundred fifty-one".