686368149619 has 8 divisors (see below), whose sum is σ = 698166461808. Its totient is φ = 674587462560.

The previous prime is 686368149611. The next prime is 686368149673. The reversal of 686368149619 is 916941863686.

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 686368149619 - 2³ = 686368149611 is a prime.

It is a super-2 number, since 2×686368149619² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (686368149611) 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, 4327717 + ... + 4483510.

It is an arithmetic number, because the mean of its divisors is an integer number (87270807726).

Almost surely, 2^686368149619 is an apocalyptic number.

686368149619 is a deficient number, since it is larger than the sum of its proper divisors (11798312189).

686368149619 is a wasteful number, since it uses less digits than its factorization.

686368149619 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8812565.

The product of its digits is 80621568, while the sum is 67.

The spelling of 686368149619 in words is "six hundred eighty-six billion, three hundred sixty-eight million, one hundred forty-nine thousand, six hundred nineteen".