11878694656 has 18 divisors (see below), whose sum is σ = 23710988672. Its totient is φ = 5939347200.

The previous prime is 11878694623. The next prime is 11878694657. The reversal of 11878694656 is 65649687811.

It is a happy number.

It is a super-2 number, since 2×11878694656² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 11878694594 and 11878694603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11878694657) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 23200320 + ... + 23200831.

Almost surely, 2^11878694656 is an apocalyptic number.

11878694656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11878694656 is a deficient number, since it is larger than the sum of its proper divisors (11832294016).

11878694656 is an frugal number, since it uses more digits than its factorization.

11878694656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46401167 (or 46401153 counting only the distinct ones).

The product of its digits is 17418240, while the sum is 61.

The spelling of 11878694656 in words is "eleven billion, eight hundred seventy-eight million, six hundred ninety-four thousand, six hundred fifty-six".