4256217007687 has 4 divisors (see below), whose sum is σ = 4256496283936. Its totient is φ = 4255937731440.

The previous prime is 4256217007673. The next prime is 4256217007739. The reversal of 4256217007687 is 7867007126524.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 4256217007687 - 2¹⁹ = 4256216483399 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4256217007667) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 139615263 + ... + 139645744.

It is an arithmetic number, because the mean of its divisors is an integer number (1064124070984).

Almost surely, 2^{4256217007687} is an apocalyptic number.

4256217007687 is a deficient number, since it is larger than the sum of its proper divisors (279276249).

4256217007687 is a wasteful number, since it uses less digits than its factorization.

4256217007687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 279276248.

The product of its (nonzero) digits is 7902720, while the sum is 55.

The spelling of 4256217007687 in words is "four trillion, two hundred fifty-six billion, two hundred seventeen million, seven thousand, six hundred eighty-seven".