11644276771 has 4 divisors (see below), whose sum is σ = 11958986992. Its totient is φ = 11329566552.

The previous prime is 11644276747. The next prime is 11644276783. The reversal of 11644276771 is 17767244611.

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-11644276771 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11644276271) 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, 157355055 + ... + 157355128.

It is an arithmetic number, because the mean of its divisors is an integer number (2989746748).

Almost surely, 2^11644276771 is an apocalyptic number.

11644276771 is a deficient number, since it is larger than the sum of its proper divisors (314710221).

11644276771 is an equidigital number, since it uses as much as digits as its factorization.

11644276771 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 314710220.

The product of its digits is 395136, while the sum is 46.

The spelling of 11644276771 in words is "eleven billion, six hundred forty-four million, two hundred seventy-six thousand, seven hundred seventy-one".