191622873972 has 24 divisors (see below), whose sum is σ = 455556267936. Its totient is φ = 62669115808.

The previous prime is 191622873947. The next prime is 191622873979. The reversal of 191622873972 is 279378226191.

It is a happy number.

191622873972 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191622873979) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150646278 + ... + 150647549.

It is an arithmetic number, because the mean of its divisors is an integer number (18981511164).

Almost surely, 2^191622873972 is an apocalyptic number.

191622873972 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191622873972 is an abundant number, since it is smaller than the sum of its proper divisors (263933393964).

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

191622873972 is a wasteful number, since it uses less digits than its factorization.

191622873972 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 301293887 (or 301293885 counting only the distinct ones).

The product of its digits is 4572288, while the sum is 57.

The spelling of 191622873972 in words is "one hundred ninety-one billion, six hundred twenty-two million, eight hundred seventy-three thousand, nine hundred seventy-two".