128910657695 has 16 divisors (see below), whose sum is σ = 155275323840. Its totient is φ = 102740419584.

The previous prime is 128910657691. The next prime is 128910657719. The reversal of 128910657695 is 596756019821.

It is a cyclic number.

It is not a de Polignac number, because 128910657695 - 2² = 128910657691 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128910657691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4628702 + ... + 4656468.

It is an arithmetic number, because the mean of its divisors is an integer number (9704707740).

Almost surely, 2^128910657695 is an apocalyptic number.

128910657695 is a deficient number, since it is larger than the sum of its proper divisors (26364666145).

128910657695 is a wasteful number, since it uses less digits than its factorization.

128910657695 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31234.

The product of its (nonzero) digits is 8164800, while the sum is 59.

The spelling of 128910657695 in words is "one hundred twenty-eight billion, nine hundred ten million, six hundred fifty-seven thousand, six hundred ninety-five".