2180129647 has 2 divisors, whose sum is σ = 2180129648. Its totient is φ = 2180129646.

The previous prime is 2180129629. The next prime is 2180129663. The reversal of 2180129647 is 7469210812.

2180129647 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2180129647 - 2²⁷ = 2045911919 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2180129617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1090064823 + 1090064824.

It is an arithmetic number, because the mean of its divisors is an integer number (1090064824).

Almost surely, 2^2180129647 is an apocalyptic number.

2180129647 is a deficient number, since it is larger than the sum of its proper divisors (1).

2180129647 is an equidigital number, since it uses as much as digits as its factorization.

2180129647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 2180129647 is about 46691.8584659039. The cubic root of 2180129647 is about 1296.6639606328.

The spelling of 2180129647 in words is "two billion, one hundred eighty million, one hundred twenty-nine thousand, six hundred forty-seven".