191939454098548 has 96 divisors (see below), whose sum is σ = 390583975985280. Its totient is φ = 81743082270720.

The previous prime is 191939454098537. The next prime is 191939454098549. The reversal of 191939454098548 is 845890454939191.

It is a super-2 number, since 2×191939454098548² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191939454098549) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 372913 + ... + 19596376.

It is an arithmetic number, because the mean of its divisors is an integer number (4068583083180).

Almost surely, 2^{191939454098548} is an apocalyptic number.

It is an amenable number.

191939454098548 is an abundant number, since it is smaller than the sum of its proper divisors (198644521886732).

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

191939454098548 is a wasteful number, since it uses less digits than its factorization.

191939454098548 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19969537 (or 19969535 counting only the distinct ones).

The product of its (nonzero) digits is 2015539200, while the sum is 79.

The spelling of 191939454098548 in words is "one hundred ninety-one trillion, nine hundred thirty-nine billion, four hundred fifty-four million, ninety-eight thousand, five hundred forty-eight".