684390955005 has 24 divisors (see below), whose sum is σ = 1206384060960. Its totient is φ = 358821923040.

The previous prime is 684390954931. The next prime is 684390955049. The reversal of 684390955005 is 500559093486.

It is a happy number.

684390955005 is a `hidden beast` number, since 6 + 8 + 43 + 9 + 0 + 95 + 500 + 5 = 666.

It is not a de Polignac number, because 684390955005 - 2⁹ = 684390954493 is a prime.

It is a congruent number.

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, 128884531 + ... + 128889840.

It is an arithmetic number, because the mean of its divisors is an integer number (50266002540).

Almost surely, 2^684390955005 is an apocalyptic number.

It is an amenable number.

684390955005 is a deficient number, since it is larger than the sum of its proper divisors (521993105955).

684390955005 is a wasteful number, since it uses less digits than its factorization.

684390955005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257774441 (or 257774438 counting only the distinct ones).

The product of its (nonzero) digits is 5832000, while the sum is 54.

The spelling of 684390955005 in words is "six hundred eighty-four billion, three hundred ninety million, nine hundred fifty-five thousand, five".