684580746891 has 8 divisors (see below), whose sum is σ = 915747536704. Its totient is φ = 454900560840.

The previous prime is 684580746847. The next prime is 684580746907. The reversal of 684580746891 is 198647085486.

684580746891 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 684580746891 - 2¹⁰ = 684580745867 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (684580746841) 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, 371649865 + ... + 371651706.

It is an arithmetic number, because the mean of its divisors is an integer number (114468442088).

Almost surely, 2^684580746891 is an apocalyptic number.

684580746891 is a deficient number, since it is larger than the sum of its proper divisors (231166789813).

684580746891 is a wasteful number, since it uses less digits than its factorization.

684580746891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743301881.

The product of its (nonzero) digits is 92897280, while the sum is 66.

The spelling of 684580746891 in words is "six hundred eighty-four billion, five hundred eighty million, seven hundred forty-six thousand, eight hundred ninety-one".