11685861078 has 16 divisors (see below), whose sum is σ = 23767853760. Its totient is φ = 3829265096.

The previous prime is 11685861059. The next prime is 11685861101. The reversal of 11685861078 is 87016858611.

It is a self number, because there is not a number n which added to its sum of digits gives 11685861078.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16505100 + ... + 16505807.

It is an arithmetic number, because the mean of its divisors is an integer number (1485490860).

Almost surely, 2^11685861078 is an apocalyptic number.

11685861078 is an abundant number, since it is smaller than the sum of its proper divisors (12081992682).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

11685861078 is a wasteful number, since it uses less digits than its factorization.

11685861078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33010971.

The product of its (nonzero) digits is 645120, while the sum is 51.

The spelling of 11685861078 in words is "eleven billion, six hundred eighty-five million, eight hundred sixty-one thousand, seventy-eight".