68400128895 has 16 divisors (see below), whose sum is σ = 125074521600. Its totient is φ = 31268630304.

The previous prime is 68400128879. The next prime is 68400128917. The reversal of 68400128895 is 59882100486.

It is not a de Polignac number, because 68400128895 - 2⁴ = 68400128879 is a prime.

It is a super-2 number, since 2×68400128895² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 325714795 + ... + 325715004.

It is an arithmetic number, because the mean of its divisors is an integer number (7817157600).

Almost surely, 2^68400128895 is an apocalyptic number.

68400128895 is a deficient number, since it is larger than the sum of its proper divisors (56674392705).

68400128895 is a wasteful number, since it uses less digits than its factorization.

68400128895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 651429814.

The product of its (nonzero) digits is 1105920, while the sum is 51.

The spelling of 68400128895 in words is "sixty-eight billion, four hundred million, one hundred twenty-eight thousand, eight hundred ninety-five".