687397793786 has 16 divisors (see below), whose sum is σ = 1124915428800. Its totient is φ = 312430577280.

The previous prime is 687397793779. The next prime is 687397793903.

687397793786 is nontrivially palindromic in base 10.

687397793786 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a self number, because there is not a number n which added to its sum of digits gives 687397793786.

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, 840311 + ... + 1442538.

It is an arithmetic number, because the mean of its divisors is an integer number (70307214300).

Almost surely, 2^687397793786 is an apocalyptic number.

687397793786 is a deficient number, since it is larger than the sum of its proper divisors (437517635014).

687397793786 is a wasteful number, since it uses less digits than its factorization.

687397793786 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2296549.

The product of its digits is 4032758016, while the sum is 80.

The spelling of 687397793786 in words is "six hundred eighty-seven billion, three hundred ninety-seven million, seven hundred ninety-three thousand, seven hundred eighty-six".