128787877579 has 2 divisors, whose sum is σ = 128787877580. Its totient is φ = 128787877578.

The previous prime is 128787877567. The next prime is 128787877649. The reversal of 128787877579 is 975778787821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128787877579 - 2¹³ = 128787869387 is a prime.

It is a super-2 number, since 2×128787877579² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (128787877079) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64393938789 + 64393938790.

It is an arithmetic number, because the mean of its divisors is an integer number (64393938790).

Almost surely, 2^128787877579 is an apocalyptic number.

128787877579 is a deficient number, since it is larger than the sum of its proper divisors (1).

128787877579 is an equidigital number, since it uses as much as digits as its factorization.

128787877579 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 774466560, while the sum is 76.

The spelling of 128787877579 in words is "one hundred twenty-eight billion, seven hundred eighty-seven million, eight hundred seventy-seven thousand, five hundred seventy-nine".