2636311081 has 2 divisors, whose sum is σ = 2636311082. Its totient is φ = 2636311080.

The previous prime is 2636311049. The next prime is 2636311201. The reversal of 2636311081 is 1801136362.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 2370131856 + 266179225 = 48684^2 + 16315^2 .

It is a cyclic number.

It is not a de Polignac number, because 2636311081 - 2⁵ = 2636311049 is a prime.

It is a super-3 number, since 3×2636311081³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (2636311031) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1318155540 + 1318155541.

It is an arithmetic number, because the mean of its divisors is an integer number (1318155541).

Almost surely, 2^2636311081 is an apocalyptic number.

It is an amenable number.

2636311081 is a deficient number, since it is larger than the sum of its proper divisors (1).

2636311081 is an equidigital number, since it uses as much as digits as its factorization.

2636311081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 2636311081 is about 51345.0200214198. The cubic root of 2636311081 is about 1381.4406087737.

The spelling of 2636311081 in words is "two billion, six hundred thirty-six million, three hundred eleven thousand, eighty-one".