684642026863 has 8 divisors (see below), whose sum is σ = 706814516736. Its totient is φ = 662474991000.

The previous prime is 684642026857. The next prime is 684642026899. The reversal of 684642026863 is 368620246486.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-684642026863 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 (684642026813) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1107613 + ... + 1611238.

It is an arithmetic number, because the mean of its divisors is an integer number (88351814592).

Almost surely, 2^684642026863 is an apocalyptic number.

684642026863 is a deficient number, since it is larger than the sum of its proper divisors (22172489873).

684642026863 is a wasteful number, since it uses less digits than its factorization.

684642026863 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2727005.

The product of its (nonzero) digits is 15925248, while the sum is 55.

The spelling of 684642026863 in words is "six hundred eighty-four billion, six hundred forty-two million, twenty-six thousand, eight hundred sixty-three".