686525144681742 has 16 divisors (see below), whose sum is σ = 1373082488601600. Its totient is φ = 228836348354232.

The previous prime is 686525144681737. The next prime is 686525144681767. The reversal of 686525144681742 is 247186441525686.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1341357742 + ... + 1341869457.

It is an arithmetic number, because the mean of its divisors is an integer number (85817655537600).

Almost surely, 2^{686525144681742} is an apocalyptic number.

686525144681742 is an abundant number, since it is smaller than the sum of its proper divisors (686557343919858).

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

686525144681742 is a wasteful number, since it uses less digits than its factorization.

686525144681742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2683269847.

The product of its digits is 619315200, while the sum is 69.

The spelling of 686525144681742 in words is "six hundred eighty-six trillion, five hundred twenty-five billion, one hundred forty-four million, six hundred eighty-one thousand, seven hundred forty-two".