191812022650 has 12 divisors (see below), whose sum is σ = 356770362222. Its totient is φ = 76724809040.

The previous prime is 191812022617. The next prime is 191812022687. The reversal of 191812022650 is 56220218191.

191812022650 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 3 ways, for example, as 156585612681 + 35226409969 = 395709^2 + 187687^2 .

It is a super-2 number, since 2×191812022650² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 5 ways as a sum of consecutive naturals, for example, 1918120177 + ... + 1918120276.

Almost surely, 2^191812022650 is an apocalyptic number.

191812022650 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191812022650 is a deficient number, since it is larger than the sum of its proper divisors (164958339572).

191812022650 is a wasteful number, since it uses less digits than its factorization.

191812022650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3836240465 (or 3836240460 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 37.

The spelling of 191812022650 in words is "one hundred ninety-one billion, eight hundred twelve million, twenty-two thousand, six hundred fifty".