684050609957 has 16 divisors (see below), whose sum is σ = 803666572800. Its totient is φ = 574009416000.

The previous prime is 684050609953. The next prime is 684050609969. The reversal of 684050609957 is 759906050486.

It is a cyclic number.

It is not a de Polignac number, because 684050609957 - 2² = 684050609953 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 684050609896 and 684050609905.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684050609953) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5710919 + ... + 5829467.

It is an arithmetic number, because the mean of its divisors is an integer number (50229160800).

Almost surely, 2^684050609957 is an apocalyptic number.

It is an amenable number.

684050609957 is a deficient number, since it is larger than the sum of its proper divisors (119615962843).

684050609957 is a wasteful number, since it uses less digits than its factorization.

684050609957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 158924.

The product of its (nonzero) digits is 16329600, while the sum is 59.

The spelling of 684050609957 in words is "six hundred eighty-four billion, fifty million, six hundred nine thousand, nine hundred fifty-seven".