686270941215 has 24 divisors (see below), whose sum is σ = 1166423143440. Its totient is φ = 344481097728.

The previous prime is 686270941193. The next prime is 686270941217. The reversal of 686270941215 is 512149072686.

It is not a de Polignac number, because 686270941215 - 2⁵ = 686270941183 is a prime.

It is a super-2 number, since 2×686270941215² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (686270941217) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 79150330 + ... + 79158999.

It is an arithmetic number, because the mean of its divisors is an integer number (48600964310).

Almost surely, 2^686270941215 is an apocalyptic number.

686270941215 is a deficient number, since it is larger than the sum of its proper divisors (480152202225).

686270941215 is a wasteful number, since it uses less digits than its factorization.

686270941215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158309371 (or 158309354 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 686270941215 in words is "six hundred eighty-six billion, two hundred seventy million, nine hundred forty-one thousand, two hundred fifteen".