191283319550 has 12 divisors (see below), whose sum is σ = 355786974456. Its totient is φ = 76513327800.

The previous prime is 191283319537. The next prime is 191283319567. The reversal of 191283319550 is 55913382191.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 191283319495 and 191283319504.

It is a congruent number.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1912833146 + ... + 1912833245.

It is an arithmetic number, because the mean of its divisors is an integer number (29648914538).

Almost surely, 2^191283319550 is an apocalyptic number.

191283319550 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191283319550 is a deficient number, since it is larger than the sum of its proper divisors (164503654906).

191283319550 is a wasteful number, since it uses less digits than its factorization.

191283319550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3825666403 (or 3825666398 counting only the distinct ones).

The product of its (nonzero) digits is 291600, while the sum is 47.

The spelling of 191283319550 in words is "one hundred ninety-one billion, two hundred eighty-three million, three hundred nineteen thousand, five hundred fifty".