128252998999 has 2 divisors, whose sum is σ = 128252999000. Its totient is φ = 128252998998.

The previous prime is 128252998963. The next prime is 128252999051. The reversal of 128252998999 is 999899252821.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 128252998999 - 2¹⁹ = 128252474711 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128252998499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64126499499 + 64126499500.

It is an arithmetic number, because the mean of its divisors is an integer number (64126499500).

Almost surely, 2^128252998999 is an apocalyptic number.

128252998999 is a deficient number, since it is larger than the sum of its proper divisors (1).

128252998999 is an equidigital number, since it uses as much as digits as its factorization.

128252998999 is an evil number, because the sum of its binary digits is even.

The product of its digits is 151165440, while the sum is 73.

It can be divided in two parts, 128252 and 998999, that added together give a triangular number (1127251 = T₁₅₀₁).

The spelling of 128252998999 in words is "one hundred twenty-eight billion, two hundred fifty-two million, nine hundred ninety-eight thousand, nine hundred ninety-nine".