671565290 has 32 divisors (see below), whose sum is σ = 1320010560. Its totient is φ = 243964800.

The previous prime is 671565289. The next prime is 671565337. The reversal of 671565290 is 92565176.

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 15 ways as a sum of consecutive naturals, for example, 139646 + ... + 144374.

It is an arithmetic number, because the mean of its divisors is an integer number (41250330).

Almost surely, 2^671565290 is an apocalyptic number.

671565290 is a deficient number, since it is larger than the sum of its proper divisors (648445270).

671565290 is a wasteful number, since it uses less digits than its factorization.

671565290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6038.

The product of its (nonzero) digits is 113400, while the sum is 41.

The square root of 671565290 is about 25914.5767860484. The cubic root of 671565290 is about 875.7149161290.

The spelling of 671565290 in words is "six hundred seventy-one million, five hundred sixty-five thousand, two hundred ninety".