71638998029 has 2 divisors, whose sum is σ = 71638998030. Its totient is φ = 71638998028.

The previous prime is 71638998023. The next prime is 71638998071. The reversal of 71638998029 is 92089983617.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69121668100 + 2517329929 = 262910^2 + 50173^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-71638998029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71638998023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35819499014 + 35819499015.

It is an arithmetic number, because the mean of its divisors is an integer number (35819499015).

Almost surely, 2^71638998029 is an apocalyptic number.

It is an amenable number.

71638998029 is a deficient number, since it is larger than the sum of its proper divisors (1).

71638998029 is an equidigital number, since it uses as much as digits as its factorization.

71638998029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11757312, while the sum is 62.

It can be divided in two parts, 716389 and 98029, that added together give a palindrome (814418).

The spelling of 71638998029 in words is "seventy-one billion, six hundred thirty-eight million, nine hundred ninety-eight thousand, twenty-nine".