191281238644050 has 48 divisors (see below), whose sum is σ = 527086079822880. Its totient is φ = 51008330304720.

The previous prime is 191281238644019. The next prime is 191281238644087. The reversal of 191281238644050 is 50446832182191.

191281238644050 is a `hidden beast` number, since 1 + 9 + 1 + 28 + 123 + 8 + 6 + 440 + 50 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 70844901852 + ... + 70844904551.

It is an arithmetic number, because the mean of its divisors is an integer number (10980959996310).

Almost surely, 2^{191281238644050} is an apocalyptic number.

191281238644050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191281238644050 is an abundant number, since it is smaller than the sum of its proper divisors (335804841178830).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191281238644050 is a wasteful number, since it uses less digits than its factorization.

191281238644050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 141689806424 (or 141689806413 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 54.

The spelling of 191281238644050 in words is "one hundred ninety-one trillion, two hundred eighty-one billion, two hundred thirty-eight million, six hundred forty-four thousand, fifty".