104636638129 has 2 divisors, whose sum is σ = 104636638130. Its totient is φ = 104636638128.

The previous prime is 104636638087. The next prime is 104636638133. The reversal of 104636638129 is 921836636401.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72227637504 + 32409000625 = 268752^2 + 180025^2 .

It is a cyclic number.

It is not a de Polignac number, because 104636638129 - 2²⁷ = 104502420401 is a prime.

It is not a weakly prime, because it can be changed into another prime (104636678129) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 52318319064 + 52318319065.

It is an arithmetic number, because the mean of its divisors is an integer number (52318319065).

Almost surely, 2^104636638129 is an apocalyptic number.

It is an amenable number.

104636638129 is a deficient number, since it is larger than the sum of its proper divisors (1).

104636638129 is an equidigital number, since it uses as much as digits as its factorization.

104636638129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1119744, while the sum is 49.

The spelling of 104636638129 in words is "one hundred four billion, six hundred thirty-six million, six hundred thirty-eight thousand, one hundred twenty-nine".