191838438708 has 48 divisors (see below), whose sum is σ = 538493867520. Its totient is φ = 51926193504.

The previous prime is 191838438707. The next prime is 191838438713. The reversal of 191838438708 is 807834838191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191838438703) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 60098166 + ... + 60101357.

It is an arithmetic number, because the mean of its divisors is an integer number (11218622240).

Almost surely, 2^191838438708 is an apocalyptic number.

It is an amenable number.

191838438708 is an abundant number, since it is smaller than the sum of its proper divisors (346655428812).

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

191838438708 is a wasteful number, since it uses less digits than its factorization.

191838438708 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 120199556 (or 120199554 counting only the distinct ones).

The product of its (nonzero) digits is 9289728, while the sum is 60.

The spelling of 191838438708 in words is "one hundred ninety-one billion, eight hundred thirty-eight million, four hundred thirty-eight thousand, seven hundred eight".