128810216746665 has 40 divisors (see below), whose sum is σ = 230925465258048. Its totient is φ = 68692467428640.

The previous prime is 128810216746663. The next prime is 128810216746711. The reversal of 128810216746665 is 566647612018821.

It is not a de Polignac number, because 128810216746665 - 2¹ = 128810216746663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (128810216746663) by changing a digit.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 10204621 + ... + 19019850.

Almost surely, 2^{128810216746665} is an apocalyptic number.

128810216746665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

128810216746665 is a deficient number, since it is larger than the sum of its proper divisors (102115248511383).

128810216746665 is a wasteful number, since it uses less digits than its factorization.

128810216746665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29235371 (or 29235362 counting only the distinct ones).

The product of its (nonzero) digits is 46448640, while the sum is 63.

The spelling of 128810216746665 in words is "one hundred twenty-eight trillion, eight hundred ten billion, two hundred sixteen million, seven hundred forty-six thousand, six hundred sixty-five".