11728878477 has 8 divisors (see below), whose sum is σ = 15667096416. Its totient is φ = 7804956432.

The previous prime is 11728878443. The next prime is 11728878479. The reversal of 11728878477 is 77487882711.

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

It is not a de Polignac number, because 11728878477 - 2²⁰ = 11727829901 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 11728878477.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11728878479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3572058 + ... + 3575339.

It is an arithmetic number, because the mean of its divisors is an integer number (1958387052).

Almost surely, 2^11728878477 is an apocalyptic number.

It is an amenable number.

11728878477 is a deficient number, since it is larger than the sum of its proper divisors (3938217939).

11728878477 is an equidigital number, since it uses as much as digits as its factorization.

11728878477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7147947.

The product of its digits is 9834496, while the sum is 60.

The spelling of 11728878477 in words is "eleven billion, seven hundred twenty-eight million, eight hundred seventy-eight thousand, four hundred seventy-seven".