4278517255165 has 16 divisors (see below), whose sum is σ = 5437409609088. Its totient is φ = 3225130197696.

The previous prime is 4278517255123. The next prime is 4278517255219. The reversal of 4278517255165 is 5615527158724.

It is a cyclic number.

It is not a de Polignac number, because 4278517255165 - 2¹⁷ = 4278517124093 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 277637802 + ... + 277653211.

It is an arithmetic number, because the mean of its divisors is an integer number (339838100568).

Almost surely, 2^{4278517255165} is an apocalyptic number.

It is an amenable number.

4278517255165 is a deficient number, since it is larger than the sum of its proper divisors (1158892353923).

4278517255165 is a wasteful number, since it uses less digits than its factorization.

4278517255165 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 555291108.

The product of its digits is 23520000, while the sum is 58.

The spelling of 4278517255165 in words is "four trillion, two hundred seventy-eight billion, five hundred seventeen million, two hundred fifty-five thousand, one hundred sixty-five".