191154972072 has 32 divisors (see below), whose sum is σ = 489543223680. Its totient is φ = 62164218240.

The previous prime is 191154972059. The next prime is 191154972077. The reversal of 191154972072 is 270279451191.

It is not an unprimeable number, because it can be changed into a prime (191154972077) 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, 97130608 + ... + 97132575.

It is an arithmetic number, because the mean of its divisors is an integer number (15298225740).

Almost surely, 2^191154972072 is an apocalyptic number.

191154972072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

191154972072 is an abundant number, since it is smaller than the sum of its proper divisors (298388251608).

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

191154972072 is a wasteful number, since it uses less digits than its factorization.

191154972072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194263233 (or 194263229 counting only the distinct ones).

The product of its (nonzero) digits is 317520, while the sum is 48.

The spelling of 191154972072 in words is "one hundred ninety-one billion, one hundred fifty-four million, nine hundred seventy-two thousand, seventy-two".