128756330411503 has 2 divisors, whose sum is σ = 128756330411504. Its totient is φ = 128756330411502.

The previous prime is 128756330411411. The next prime is 128756330411539. The reversal of 128756330411503 is 305114033657821.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128756330411503 is a prime.

It is a super-4 number, since 4×128756330411503⁴ (a number of 58 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (128756330411563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 64378165205751 + 64378165205752.

It is an arithmetic number, because the mean of its divisors is an integer number (64378165205752).

Almost surely, 2^{128756330411503} is an apocalyptic number.

128756330411503 is a deficient number, since it is larger than the sum of its proper divisors (1).

128756330411503 is an equidigital number, since it uses as much as digits as its factorization.

128756330411503 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1814400, while the sum is 49.

The spelling of 128756330411503 in words is "one hundred twenty-eight trillion, seven hundred fifty-six billion, three hundred thirty million, four hundred eleven thousand, five hundred three".