191909326955 has 16 divisors (see below), whose sum is σ = 231614082720. Its totient is φ = 152645805312.

The previous prime is 191909326951. The next prime is 191909326993. The reversal of 191909326955 is 559623909191.

It is a cyclic number.

It is not a de Polignac number, because 191909326955 - 2² = 191909326951 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 191909326894 and 191909326903.

It is not an unprimeable number, because it can be changed into a prime (191909326951) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7628057 + ... + 7653173.

It is an arithmetic number, because the mean of its divisors is an integer number (14475880170).

Almost surely, 2^191909326955 is an apocalyptic number.

191909326955 is a deficient number, since it is larger than the sum of its proper divisors (39704755765).

191909326955 is a wasteful number, since it uses less digits than its factorization.

191909326955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33838.

The product of its (nonzero) digits is 5904900, while the sum is 59.

The spelling of 191909326955 in words is "one hundred ninety-one billion, nine hundred nine million, three hundred twenty-six thousand, nine hundred fifty-five".