684651271231 has 2 divisors, whose sum is σ = 684651271232. Its totient is φ = 684651271230.

The previous prime is 684651271217. The next prime is 684651271253. The reversal of 684651271231 is 132172156486.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 684651271231 - 2⁷ = 684651271103 is a prime.

It is a super-2 number, since 2×684651271231² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (684651271261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 342325635615 + 342325635616.

It is an arithmetic number, because the mean of its divisors is an integer number (342325635616).

Almost surely, 2^684651271231 is an apocalyptic number.

684651271231 is a deficient number, since it is larger than the sum of its proper divisors (1).

684651271231 is an equidigital number, since it uses as much as digits as its factorization.

684651271231 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 46.

The spelling of 684651271231 in words is "six hundred eighty-four billion, six hundred fifty-one million, two hundred seventy-one thousand, two hundred thirty-one".