2685856407278 has 64 divisors (see below), whose sum is σ = 4582048201920. Its totient is φ = 1169561702400.

The previous prime is 2685856407257. The next prime is 2685856407337. The reversal of 2685856407278 is 8727046585862.

It is a super-2 number, since 2×2685856407278² (a number of 26 digits) contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 209156138 + ... + 209168978.

It is an arithmetic number, because the mean of its divisors is an integer number (71594503155).

Almost surely, 2^{2685856407278} is an apocalyptic number.

2685856407278 is a deficient number, since it is larger than the sum of its proper divisors (1896191794642).

2685856407278 is a wasteful number, since it uses less digits than its factorization.

2685856407278 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15413.

The product of its (nonzero) digits is 361267200, while the sum is 68.

The spelling of 2685856407278 in words is "two trillion, six hundred eighty-five billion, eight hundred fifty-six million, four hundred seven thousand, two hundred seventy-eight".