28507295137 has 2 divisors, whose sum is σ = 28507295138. Its totient is φ = 28507295136.

The previous prime is 28507295111. The next prime is 28507295197. The reversal of 28507295137 is 73159270582.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27079664481 + 1427630656 = 164559^2 + 37784^2 .

It is a cyclic number.

It is not a de Polignac number, because 28507295137 - 2¹⁹ = 28506770849 is a prime.

It is not a weakly prime, because it can be changed into another prime (28507295197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14253647568 + 14253647569.

It is an arithmetic number, because the mean of its divisors is an integer number (14253647569).

Almost surely, 2^28507295137 is an apocalyptic number.

It is an amenable number.

28507295137 is a deficient number, since it is larger than the sum of its proper divisors (1).

28507295137 is an equidigital number, since it uses as much as digits as its factorization.

28507295137 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1058400, while the sum is 49.

The spelling of 28507295137 in words is "twenty-eight billion, five hundred seven million, two hundred ninety-five thousand, one hundred thirty-seven".