686372191034 has 8 divisors (see below), whose sum is σ = 1029563928288. Its totient is φ = 343184214940.

The previous prime is 686372191019. The next prime is 686372191061. The reversal of 686372191034 is 430191273686.

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

It is a super-2 number, since 2×686372191034² (a number of 24 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 428312 + ... + 1247475.

It is an arithmetic number, because the mean of its divisors is an integer number (128695491036).

Almost surely, 2^686372191034 is an apocalyptic number.

686372191034 is a deficient number, since it is larger than the sum of its proper divisors (343191737254).

686372191034 is a wasteful number, since it uses less digits than its factorization.

686372191034 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1880580.

The product of its (nonzero) digits is 1306368, while the sum is 50.

The spelling of 686372191034 in words is "six hundred eighty-six billion, three hundred seventy-two million, one hundred ninety-one thousand, thirty-four".