191138225369 has 16 divisors (see below), whose sum is σ = 235487941248. Its totient is φ = 151075383552.

The previous prime is 191138225359. The next prime is 191138225423. The reversal of 191138225369 is 963522831191.

191138225369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 191138225369 - 2¹⁶ = 191138159833 is a prime.

It is a super-2 number, since 2×191138225369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (191138225359) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 986027 + ... + 1163840.

It is an arithmetic number, because the mean of its divisors is an integer number (14717996328).

Almost surely, 2^191138225369 is an apocalyptic number.

It is an amenable number.

191138225369 is a deficient number, since it is larger than the sum of its proper divisors (44349715879).

191138225369 is a wasteful number, since it uses less digits than its factorization.

191138225369 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2150864.

The product of its digits is 699840, while the sum is 50.

The spelling of 191138225369 in words is "one hundred ninety-one billion, one hundred thirty-eight million, two hundred twenty-five thousand, three hundred sixty-nine".