684651271230 has 320 divisors, whose sum is σ = 1985424167232. Its totient is φ = 168663306240.

The previous prime is 684651271217. The next prime is 684651271231. The reversal of 684651271230 is 32172156486.

684651271230 is a `hidden beast` number, since 6 + 8 + 4 + 6 + 512 + 7 + 123 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (684651271231) by changing a digit.

It is a polite number, since it can be written in 159 ways as a sum of consecutive naturals, for example, 292459860 + ... + 292462200.

Almost surely, 2^684651271230 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 684651271230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (992712083616).

684651271230 is an abundant number, since it is smaller than the sum of its proper divisors (1300772896002).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

684651271230 is a wasteful number, since it uses less digits than its factorization.

684651271230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2761 (or 2752 counting only the distinct ones).

The product of its (nonzero) digits is 483840, while the sum is 45.

The spelling of 684651271230 in words is "six hundred eighty-four billion, six hundred fifty-one million, two hundred seventy-one thousand, two hundred thirty".