686145954 has 16 divisors (see below), whose sum is σ = 1477852992. Its totient is φ = 211121808.

The previous prime is 686145949. The next prime is 686145961. The reversal of 686145954 is 459541686.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4398294 + ... + 4398449.

It is an arithmetic number, because the mean of its divisors is an integer number (92365812).

Almost surely, 2^686145954 is an apocalyptic number.

686145954 is an abundant number, since it is smaller than the sum of its proper divisors (791707038).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

686145954 is a wasteful number, since it uses less digits than its factorization.

686145954 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8796761.

The product of its digits is 1036800, while the sum is 48.

The square root of 686145954 is about 26194.3878340380. The cubic root of 686145954 is about 882.0072782859.

The spelling of 686145954 in words is "six hundred eighty-six million, one hundred forty-five thousand, nine hundred fifty-four".