28526661029 has 2 divisors, whose sum is σ = 28526661030. Its totient is φ = 28526661028.

The previous prime is 28526661019. The next prime is 28526661073. The reversal of 28526661029 is 92016662582.

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., 24941884900 + 3584776129 = 157930^2 + 59873^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28526661029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28526661019) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14263330514 + 14263330515.

It is an arithmetic number, because the mean of its divisors is an integer number (14263330515).

Almost surely, 2^28526661029 is an apocalyptic number.

It is an amenable number.

28526661029 is a deficient number, since it is larger than the sum of its proper divisors (1).

28526661029 is an equidigital number, since it uses as much as digits as its factorization.

28526661029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 622080, while the sum is 47.

The spelling of 28526661029 in words is "twenty-eight billion, five hundred twenty-six million, six hundred sixty-one thousand, twenty-nine".