686370552785 has 16 divisors (see below), whose sum is σ = 827000254080. Its totient is φ = 546859776000.

The previous prime is 686370552677. The next prime is 686370552811. The reversal of 686370552785 is 587255073686.

It is a happy number.

It is not a de Polignac number, because 686370552785 - 2²⁰ = 686369504209 is a prime.

It is a super-2 number, since 2×686370552785² (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 15 ways as a sum of consecutive naturals, for example, 21518609 + ... + 21550481.

It is an arithmetic number, because the mean of its divisors is an integer number (51687515880).

Almost surely, 2^686370552785 is an apocalyptic number.

It is an amenable number.

686370552785 is a deficient number, since it is larger than the sum of its proper divisors (140629701295).

686370552785 is a wasteful number, since it uses less digits than its factorization.

686370552785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49288.

The product of its (nonzero) digits is 84672000, while the sum is 62.

The spelling of 686370552785 in words is "six hundred eighty-six billion, three hundred seventy million, five hundred fifty-two thousand, seven hundred eighty-five".