11777671721 has 8 divisors (see below), whose sum is σ = 12492189600. Its totient is φ = 11072617920.

The previous prime is 11777671693. The next prime is 11777671733. The reversal of 11777671721 is 12717677711.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 11777671721 - 2⁶ = 11777671657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11777671751) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2363456 + ... + 2368433.

It is an arithmetic number, because the mean of its divisors is an integer number (1561523700).

Almost surely, 2^11777671721 is an apocalyptic number.

It is an amenable number.

11777671721 is a deficient number, since it is larger than the sum of its proper divisors (714517879).

11777671721 is a wasteful number, since it uses less digits than its factorization.

11777671721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4732039.

The product of its digits is 201684, while the sum is 47.

The spelling of 11777671721 in words is "eleven billion, seven hundred seventy-seven million, six hundred seventy-one thousand, seven hundred twenty-one".