191969293728 has 48 divisors (see below), whose sum is σ = 503947192896. Its totient is φ = 63986234880.

The previous prime is 191969293727. The next prime is 191969293739. The reversal of 191969293728 is 827392969191.

It is a tau number, because it is divible by the number of its divisors (48).

It is not an unprimeable number, because it can be changed into a prime (191969293721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2151900 + ... + 2239332.

It is an arithmetic number, because the mean of its divisors is an integer number (10498899852).

Almost surely, 2^191969293728 is an apocalyptic number.

It is an amenable number.

191969293728 is an abundant number, since it is smaller than the sum of its proper divisors (311977899168).

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

191969293728 is a wasteful number, since it uses less digits than its factorization.

191969293728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 110317 (or 110309 counting only the distinct ones).

The product of its digits is 26453952, while the sum is 66.

The spelling of 191969293728 in words is "one hundred ninety-one billion, nine hundred sixty-nine million, two hundred ninety-three thousand, seven hundred twenty-eight".