128563539951 has 32 divisors (see below), whose sum is σ = 213741158400. Its totient is φ = 66778397280.

The previous prime is 128563539901. The next prime is 128563539983. The reversal of 128563539951 is 159935365821.

It is not a de Polignac number, because 128563539951 - 2⁷ = 128563539823 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 128563539891 and 128563539900.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (128563539901) by changing a digit.

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 31 ways as a sum of consecutive naturals, for example, 2291290 + ... + 2346728.

It is an arithmetic number, because the mean of its divisors is an integer number (6679411200).

Almost surely, 2^128563539951 is an apocalyptic number.

128563539951 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

128563539951 is a deficient number, since it is larger than the sum of its proper divisors (85177618449).

128563539951 is a wasteful number, since it uses less digits than its factorization.

128563539951 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65499.

The product of its digits is 8748000, while the sum is 57.

The spelling of 128563539951 in words is "one hundred twenty-eight billion, five hundred sixty-three million, five hundred thirty-nine thousand, nine hundred fifty-one".