32646464581 has 2 divisors, whose sum is σ = 32646464582. Its totient is φ = 32646464580.

The previous prime is 32646464567. The next prime is 32646464659. The reversal of 32646464581 is 18546464623.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31235260225 + 1411204356 = 176735^2 + 37566^2 .

It is a cyclic number.

It is not a de Polignac number, because 32646464581 - 2⁷ = 32646464453 is a prime.

It is a super-2 number, since 2×32646464581² (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 (32646464531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16323232290 + 16323232291.

It is an arithmetic number, because the mean of its divisors is an integer number (16323232291).

Almost surely, 2^32646464581 is an apocalyptic number.

It is an amenable number.

32646464581 is a deficient number, since it is larger than the sum of its proper divisors (1).

32646464581 is an equidigital number, since it uses as much as digits as its factorization.

32646464581 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 49.

The spelling of 32646464581 in words is "thirty-two billion, six hundred forty-six million, four hundred sixty-four thousand, five hundred eighty-one".