128074515637 has 2 divisors, whose sum is σ = 128074515638. Its totient is φ = 128074515636.

The previous prime is 128074515617. The next prime is 128074515641. The reversal of 128074515637 is 736515470821.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 108553116676 + 19521398961 = 329474^2 + 139719^2 .

It is a cyclic number.

It is not a de Polignac number, because 128074515637 - 2⁷ = 128074515509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128074515617) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64037257818 + 64037257819.

It is an arithmetic number, because the mean of its divisors is an integer number (64037257819).

Almost surely, 2^128074515637 is an apocalyptic number.

It is an amenable number.

128074515637 is a deficient number, since it is larger than the sum of its proper divisors (1).

128074515637 is an equidigital number, since it uses as much as digits as its factorization.

128074515637 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1411200, while the sum is 49.

The spelling of 128074515637 in words is "one hundred twenty-eight billion, seventy-four million, five hundred fifteen thousand, six hundred thirty-seven".