2855434067865 has 24 divisors (see below), whose sum is σ = 4949572492800. Its totient is φ = 1522850956704.

The previous prime is 2855434067777. The next prime is 2855434067879. The reversal of 2855434067865 is 5687604345582.

2855434067865 is a `hidden beast` number, since 2 + 8 + 5 + 543 + 4 + 0 + 6 + 7 + 86 + 5 = 666.

It is not a de Polignac number, because 2855434067865 - 2⁸ = 2855434067609 is a prime.

It is a super-2 number, since 2×2855434067865² (a number of 26 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 508936 + ... + 2443334.

It is an arithmetic number, because the mean of its divisors is an integer number (206232187200).

Almost surely, 2^{2855434067865} is an apocalyptic number.

It is an amenable number.

2855434067865 is a deficient number, since it is larger than the sum of its proper divisors (2094138424935).

2855434067865 is a wasteful number, since it uses less digits than its factorization.

2855434067865 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1967213 (or 1967210 counting only the distinct ones).

The product of its (nonzero) digits is 193536000, while the sum is 63.

The spelling of 2855434067865 in words is "two trillion, eight hundred fifty-five billion, four hundred thirty-four million, sixty-seven thousand, eight hundred sixty-five".