28129274141 has 2 divisors, whose sum is σ = 28129274142. Its totient is φ = 28129274140.

The previous prime is 28129274099. The next prime is 28129274221. The reversal of 28129274141 is 14147292182.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25704105625 + 2425168516 = 160325^2 + 49246^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28129274141 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28129274441) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14064637070 + 14064637071.

It is an arithmetic number, because the mean of its divisors is an integer number (14064637071).

Almost surely, 2^28129274141 is an apocalyptic number.

It is an amenable number.

28129274141 is a deficient number, since it is larger than the sum of its proper divisors (1).

28129274141 is an equidigital number, since it uses as much as digits as its factorization.

28129274141 is an evil number, because the sum of its binary digits is even.

The product of its digits is 64512, while the sum is 41.

The spelling of 28129274141 in words is "twenty-eight billion, one hundred twenty-nine million, two hundred seventy-four thousand, one hundred forty-one".