191229138824 has 32 divisors (see below), whose sum is σ = 384220156320. Its totient is φ = 88905958656.

The previous prime is 191229138787. The next prime is 191229138833. The reversal of 191229138824 is 428831922191.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8459174 + ... + 8481749.

It is an arithmetic number, because the mean of its divisors is an integer number (12006879885).

Almost surely, 2^191229138824 is an apocalyptic number.

It is an amenable number.

191229138824 is an abundant number, since it is smaller than the sum of its proper divisors (192991017496).

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

191229138824 is a wasteful number, since it uses less digits than its factorization.

191229138824 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16941029 (or 16941025 counting only the distinct ones).

The product of its digits is 497664, while the sum is 50.

The spelling of 191229138824 in words is "one hundred ninety-one billion, two hundred twenty-nine million, one hundred thirty-eight thousand, eight hundred twenty-four".