32778605081 has 2 divisors, whose sum is σ = 32778605082. Its totient is φ = 32778605080.

The previous prime is 32778605071. The next prime is 32778605113. The reversal of 32778605081 is 18050687723.

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., 32472040000 + 306565081 = 180200^2 + 17509^2 .

It is a cyclic number.

It is not a de Polignac number, because 32778605081 - 2⁶ = 32778605017 is a prime.

It is a super-2 number, since 2×32778605081² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (32778605071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16389302540 + 16389302541.

It is an arithmetic number, because the mean of its divisors is an integer number (16389302541).

Almost surely, 2^32778605081 is an apocalyptic number.

It is an amenable number.

32778605081 is a deficient number, since it is larger than the sum of its proper divisors (1).

32778605081 is an equidigital number, since it uses as much as digits as its factorization.

32778605081 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 32778605081 in words is "thirty-two billion, seven hundred seventy-eight million, six hundred five thousand, eighty-one".