191989283616 has 144 divisors (see below), whose sum is σ = 606357148320. Its totient is φ = 59073580800.

The previous prime is 191989283597. The next prime is 191989283627. The reversal of 191989283616 is 616382989191.

191989283616 is a `hidden beast` number, since 1 + 9 + 1 + 9 + 8 + 9 + 2 + 8 + 3 + 616 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 511410 + ... + 803441.

It is an arithmetic number, because the mean of its divisors is an integer number (4210813530).

Almost surely, 2^191989283616 is an apocalyptic number.

191989283616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

191989283616 is an abundant number, since it is smaller than the sum of its proper divisors (414367864704).

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

191989283616 is a wasteful number, since it uses less digits than its factorization.

191989283616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1314896 (or 1314869 counting only the distinct ones).

The product of its digits is 10077696, while the sum is 63.

The spelling of 191989283616 in words is "one hundred ninety-one billion, nine hundred eighty-nine million, two hundred eighty-three thousand, six hundred sixteen".