10686648885787 has 4 divisors (see below), whose sum is σ = 12213313012336. Its totient is φ = 9159984759240.

The previous prime is 10686648885767. The next prime is 10686648885877. The reversal of 10686648885787 is 78758884668601.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-10686648885787 is a prime.

It is a super-2 number, since 2×10686648885787² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 10686648885787.

It is not an unprimeable number, because it can be changed into a prime (10686648885767) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 763332063264 + ... + 763332063277.

It is an arithmetic number, because the mean of its divisors is an integer number (3053328253084).

Almost surely, 2^{10686648885787} is an apocalyptic number.

10686648885787 is a deficient number, since it is larger than the sum of its proper divisors (1526664126549).

10686648885787 is an equidigital number, since it uses as much as digits as its factorization.

10686648885787 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1526664126548.

The product of its (nonzero) digits is 6936330240, while the sum is 82.

The spelling of 10686648885787 in words is "ten trillion, six hundred eighty-six billion, six hundred forty-eight million, eight hundred eighty-five thousand, seven hundred eighty-seven".