32581578061 has 2 divisors, whose sum is σ = 32581578062. Its totient is φ = 32581578060.

The previous prime is 32581578059. The next prime is 32581578079. The reversal of 32581578061 is 16087518523.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32397840036 + 183738025 = 179994^2 + 13555^2 .

It is a cyclic number.

It is not a de Polignac number, because 32581578061 - 2¹ = 32581578059 is a prime.

Together with 32581578059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32581578761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16290789030 + 16290789031.

It is an arithmetic number, because the mean of its divisors is an integer number (16290789031).

Almost surely, 2^32581578061 is an apocalyptic number.

It is an amenable number.

32581578061 is a deficient number, since it is larger than the sum of its proper divisors (1).

32581578061 is an equidigital number, since it uses as much as digits as its factorization.

32581578061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 403200, while the sum is 46.

The spelling of 32581578061 in words is "thirty-two billion, five hundred eighty-one million, five hundred seventy-eight thousand, sixty-one".