11878677217 has 8 divisors (see below), whose sum is σ = 12965069952. Its totient is φ = 10793370000.

The previous prime is 11878677179. The next prime is 11878677227. The reversal of 11878677217 is 71277687811.

It is a happy number.

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 11878677217 - 2¹¹ = 11878675169 is a prime.

It is a super-2 number, since 2×11878677217² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (11878677227) 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, 248409 + ... + 292342.

It is an arithmetic number, because the mean of its divisors is an integer number (1620633744).

Almost surely, 2^11878677217 is an apocalyptic number.

It is an amenable number.

11878677217 is a deficient number, since it is larger than the sum of its proper divisors (1086392735).

11878677217 is a wasteful number, since it uses less digits than its factorization.

11878677217 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 542759.

The product of its digits is 1843968, while the sum is 55.

The spelling of 11878677217 in words is "eleven billion, eight hundred seventy-eight million, six hundred seventy-seven thousand, two hundred seventeen".