191490013950 has 48 divisors (see below), whose sum is σ = 481583926656. Its totient is φ = 50344789600.

The previous prime is 191490013927. The next prime is 191490013951. The reversal of 191490013950 is 59310094191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191490013951) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8979492 + ... + 9000791.

It is an arithmetic number, because the mean of its divisors is an integer number (10032998472).

Almost surely, 2^191490013950 is an apocalyptic number.

191490013950 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

191490013950 is an abundant number, since it is smaller than the sum of its proper divisors (290093912706).

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

191490013950 is a wasteful number, since it uses less digits than its factorization.

191490013950 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17980369 (or 17980364 counting only the distinct ones).

The product of its (nonzero) digits is 43740, while the sum is 42.

The spelling of 191490013950 in words is "one hundred ninety-one billion, four hundred ninety million, thirteen thousand, nine hundred fifty".