32616132581 has 2 divisors, whose sum is σ = 32616132582. Its totient is φ = 32616132580.

The previous prime is 32616132559. The next prime is 32616132649. The reversal of 32616132581 is 18523161623.

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., 21027610081 + 11588522500 = 145009^2 + 107650^2 .

It is a cyclic number.

It is not a de Polignac number, because 32616132581 - 2¹⁸ = 32615870437 is a prime.

It is a super-2 number, since 2×32616132581² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32616135581) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16308066290 + 16308066291.

It is an arithmetic number, because the mean of its divisors is an integer number (16308066291).

Almost surely, 2^32616132581 is an apocalyptic number.

It is an amenable number.

32616132581 is a deficient number, since it is larger than the sum of its proper divisors (1).

32616132581 is an equidigital number, since it uses as much as digits as its factorization.

32616132581 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 51840, while the sum is 38.

The spelling of 32616132581 in words is "thirty-two billion, six hundred sixteen million, one hundred thirty-two thousand, five hundred eighty-one".