128831952895 has 4 divisors (see below), whose sum is σ = 154598343480. Its totient is φ = 103065562312.

The previous prime is 128831952841. The next prime is 128831952943. The reversal of 128831952895 is 598259138821.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 598259138821 = 523 ⋅1143898927.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-128831952895 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12883195285 + ... + 12883195294.

It is an arithmetic number, because the mean of its divisors is an integer number (38649585870).

Almost surely, 2^128831952895 is an apocalyptic number.

128831952895 is a deficient number, since it is larger than the sum of its proper divisors (25766390585).

128831952895 is an equidigital number, since it uses as much as digits as its factorization.

128831952895 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25766390584.

The product of its digits is 12441600, while the sum is 61.

The spelling of 128831952895 in words is "one hundred twenty-eight billion, eight hundred thirty-one million, nine hundred fifty-two thousand, eight hundred ninety-five".