30832439681 has 2 divisors, whose sum is σ = 30832439682. Its totient is φ = 30832439680.

The previous prime is 30832439669. The next prime is 30832439731. The reversal of 30832439681 is 18693423803.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27720585025 + 3111854656 = 166495^2 + 55784^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30832439681 is a prime.

It is a super-2 number, since 2×30832439681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (30832439621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15416219840 + 15416219841.

It is an arithmetic number, because the mean of its divisors is an integer number (15416219841).

Almost surely, 2^30832439681 is an apocalyptic number.

It is an amenable number.

30832439681 is a deficient number, since it is larger than the sum of its proper divisors (1).

30832439681 is an equidigital number, since it uses as much as digits as its factorization.

30832439681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 746496, while the sum is 47.

The spelling of 30832439681 in words is "thirty billion, eight hundred thirty-two million, four hundred thirty-nine thousand, six hundred eighty-one".