671916450 has 24 divisors (see below), whose sum is σ = 1666353168. Its totient is φ = 179177680.

The previous prime is 671916389. The next prime is 671916461. The reversal of 671916450 is 54619176.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 671916399 and 671916408.

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, 2239572 + ... + 2239871.

It is an arithmetic number, because the mean of its divisors is an integer number (69431382).

Almost surely, 2^671916450 is an apocalyptic number.

671916450 is an abundant number, since it is smaller than the sum of its proper divisors (994436718).

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

671916450 is a wasteful number, since it uses less digits than its factorization.

671916450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4479458 (or 4479453 counting only the distinct ones).

The product of its (nonzero) digits is 45360, while the sum is 39.

The square root of 671916450 is about 25921.3512379274. The cubic root of 671916450 is about 875.8675259945.

The spelling of 671916450 in words is "six hundred seventy-one million, nine hundred sixteen thousand, four hundred fifty".