171555672 has 16 divisors (see below), whose sum is σ = 428889240. Its totient is φ = 57185216.

The previous prime is 171555661. The next prime is 171555673. The reversal of 171555672 is 276555171.

It is a self number, because there is not a number n which added to its sum of digits gives 171555672.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (171555673) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3574053 + ... + 3574100.

Almost surely, 2^171555672 is an apocalyptic number.

171555672 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

171555672 is an abundant number, since it is smaller than the sum of its proper divisors (257333568).

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

171555672 is a wasteful number, since it uses less digits than its factorization.

171555672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7148162 (or 7148158 counting only the distinct ones).

The product of its digits is 73500, while the sum is 39.

The square root of 171555672 is about 13097.9262480745. The cubic root of 171555672 is about 555.6504799103.

The spelling of 171555672 in words is "one hundred seventy-one million, five hundred fifty-five thousand, six hundred seventy-two".