191438493050 has 48 divisors (see below), whose sum is σ = 410677048320. Its totient is φ = 65033876160.

The previous prime is 191438493019. The next prime is 191438493053. The reversal of 191438493050 is 50394834191.

It is a junction number, because it is equal to n+sod(n) for n = 191438492986 and 191438493004.

It is not an unprimeable number, because it can be changed into a prime (191438493053) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2470874 + ... + 2547173.

It is an arithmetic number, because the mean of its divisors is an integer number (8555771840).

Almost surely, 2^191438493050 is an apocalyptic number.

191438493050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191438493050 is an abundant number, since it is smaller than the sum of its proper divisors (219238555270).

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

191438493050 is a wasteful number, since it uses less digits than its factorization.

191438493050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5018175 (or 5018170 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 47.

The spelling of 191438493050 in words is "one hundred ninety-one billion, four hundred thirty-eight million, four hundred ninety-three thousand, fifty".