686629894495 has 8 divisors (see below), whose sum is σ = 824065676784. Its totient is φ = 549230713344.

The previous prime is 686629894469. The next prime is 686629894499. The reversal of 686629894495 is 594498926686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 686629894495 - 2⁵ = 686629894463 is a prime.

It is a super-2 number, since 2×686629894495² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686629894499) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9108994 + ... + 9184063.

It is an arithmetic number, because the mean of its divisors is an integer number (103008209598).

Almost surely, 2^686629894495 is an apocalyptic number.

686629894495 is a deficient number, since it is larger than the sum of its proper divisors (137435782289).

686629894495 is a wasteful number, since it uses less digits than its factorization.

686629894495 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18300569.

The product of its digits is 1612431360, while the sum is 76.

The spelling of 686629894495 in words is "six hundred eighty-six billion, six hundred twenty-nine million, eight hundred ninety-four thousand, four hundred ninety-five".