191338664880484 has 81 divisors (see below), whose sum is σ = 384762204896601. Its totient is φ = 83187680706240.

The previous prime is 191338664880469. The next prime is 191338664880499. The reversal of 191338664880484 is 484088466833191.

The square root of 191338664880484 is 13832522.

It is a perfect power (a square), and thus also a powerful number.

It is an interprime number because it is at equal distance from previous prime (191338664880469) and next prime (191338664880499).

It can be written as a sum of positive squares in only one way, i.e., 179191153612900 + 12147511267584 = 13386230^2 + 3485328^2 .

It is a super-2 number, since 2×191338664880484² (a number of 29 digits) contains 22 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 6999242464 + ... + 6999269800.

Almost surely, 2^{191338664880484} is an apocalyptic number.

191338664880484 is the 13832522-nd square number.

It is an amenable number.

191338664880484 is an abundant number, since it is smaller than the sum of its proper divisors (193423540016117).

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

191338664880484 is an frugal number, since it uses more digits than its factorization.

191338664880484 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54746 (or 27373 counting only the distinct ones).

The product of its (nonzero) digits is 764411904, while the sum is 73.

The spelling of 191338664880484 in words is "one hundred ninety-one trillion, three hundred thirty-eight billion, six hundred sixty-four million, eight hundred eighty thousand, four hundred eighty-four".