686677091121 has 24 divisors (see below), whose sum is σ = 1143593717760. Its totient is φ = 388914454656.

The previous prime is 686677091119. The next prime is 686677091131. The reversal of 686677091121 is 121190776686.

686677091121 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 686677091121 - 2¹ = 686677091119 is a prime.

It is not an unprimeable number, because it can be changed into a prime (686677091101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 48221361 + ... + 48235598.

It is an arithmetic number, because the mean of its divisors is an integer number (47649738240).

Almost surely, 2^686677091121 is an apocalyptic number.

It is an amenable number.

686677091121 is a deficient number, since it is larger than the sum of its proper divisors (456916626639).

686677091121 is a wasteful number, since it uses less digits than its factorization.

686677091121 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96457085 (or 96457082 counting only the distinct ones).

The product of its (nonzero) digits is 1524096, while the sum is 54.

The spelling of 686677091121 in words is "six hundred eighty-six billion, six hundred seventy-seven million, ninety-one thousand, one hundred twenty-one".