11701720855 has 16 divisors (see below), whose sum is σ = 16124860800. Its totient is φ = 8062428960.

The previous prime is 11701720831. The next prime is 11701720883. The reversal of 11701720855 is 55802710711.

It is a happy number.

It is not a de Polignac number, because 11701720855 - 2⁹ = 11701720343 is a prime.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5597865 + ... + 5599954.

It is an arithmetic number, because the mean of its divisors is an integer number (1007803800).

Almost surely, 2^11701720855 is an apocalyptic number.

11701720855 is a deficient number, since it is larger than the sum of its proper divisors (4423139945).

11701720855 is a wasteful number, since it uses less digits than its factorization.

11701720855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11197854.

The product of its (nonzero) digits is 19600, while the sum is 37.

The spelling of 11701720855 in words is "eleven billion, seven hundred one million, seven hundred twenty thousand, eight hundred fifty-five".