128178635701 has 2 divisors, whose sum is σ = 128178635702. Its totient is φ = 128178635700.

The previous prime is 128178635671. The next prime is 128178635777. The reversal of 128178635701 is 107536871821.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 94495374801 + 33683260900 = 307401^2 + 183530^2 .

It is a cyclic number.

It is not a de Polignac number, because 128178635701 - 2²¹ = 128176538549 is a prime.

It is a super-2 number, since 2×128178635701² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128178635201) 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, 64089317850 + 64089317851.

It is an arithmetic number, because the mean of its divisors is an integer number (64089317851).

Almost surely, 2^128178635701 is an apocalyptic number.

It is an amenable number.

128178635701 is a deficient number, since it is larger than the sum of its proper divisors (1).

128178635701 is an equidigital number, since it uses as much as digits as its factorization.

128178635701 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 128178635701 in words is "one hundred twenty-eight billion, one hundred seventy-eight million, six hundred thirty-five thousand, seven hundred one".