191559128255 has 32 divisors (see below), whose sum is σ = 267955490880. Its totient is φ = 129917675520.

The previous prime is 191559128209. The next prime is 191559128297. The reversal of 191559128255 is 552821955191.

It is not a de Polignac number, because 191559128255 - 2¹⁶ = 191559062719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191559128197 and 191559128206.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 837884 + ... + 1041713.

It is an arithmetic number, because the mean of its divisors is an integer number (8373609090).

Almost surely, 2^191559128255 is an apocalyptic number.

191559128255 is a deficient number, since it is larger than the sum of its proper divisors (76396362625).

191559128255 is a wasteful number, since it uses less digits than its factorization.

191559128255 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879739.

The product of its digits is 1620000, while the sum is 53.

The spelling of 191559128255 in words is "one hundred ninety-one billion, five hundred fifty-nine million, one hundred twenty-eight thousand, two hundred fifty-five".