291172454995168 has 72 divisors (see below), whose sum is σ = 629947924313400. Its totient is φ = 132297423648768.

The previous prime is 291172454995141. The next prime is 291172454995189. The reversal of 291172454995168 is 861599454271192.

It is a self number, because there is not a number n which added to its sum of digits gives 291172454995168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 542575098 + ... + 543111481.

It is an arithmetic number, because the mean of its divisors is an integer number (8749276726575).

Almost surely, 2^{291172454995168} is an apocalyptic number.

It is an amenable number.

291172454995168 is an abundant number, since it is smaller than the sum of its proper divisors (338775469318232).

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

291172454995168 is a wasteful number, since it uses less digits than its factorization.

291172454995168 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1085686652 (or 1085686627 counting only the distinct ones).

The product of its digits is 391910400, while the sum is 73.

The spelling of 291172454995168 in words is "two hundred ninety-one trillion, one hundred seventy-two billion, four hundred fifty-four million, nine hundred ninety-five thousand, one hundred sixty-eight".