171625640 has 16 divisors (see below), whose sum is σ = 386157780. Its totient is φ = 68650240.

The previous prime is 171625639. The next prime is 171625667. The reversal of 171625640 is 46526171.

It can be written as a sum of positive squares in 2 ways, for example, as 156400036 + 15225604 = 12506^2 + 3902^2 .

It is a junction number, because it is equal to n+sod(n) for n = 171625597 and 171625606.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2145281 + ... + 2145360.

Almost surely, 2^171625640 is an apocalyptic number.

171625640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

171625640 is an abundant number, since it is smaller than the sum of its proper divisors (214532140).

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

171625640 is a wasteful number, since it uses less digits than its factorization.

171625640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4290652 (or 4290648 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 32.

The square root of 171625640 is about 13100.5969329645. The cubic root of 171625640 is about 555.7260092670.

The spelling of 171625640 in words is "one hundred seventy-one million, six hundred twenty-five thousand, six hundred forty".