671809614 has 32 divisors (see below), whose sum is σ = 1536389376. Its totient is φ = 191842560.

The previous prime is 671809591. The next prime is 671809637. The reversal of 671809614 is 416908176.

It is an interprime number because it is at equal distance from previous prime (671809591) and next prime (671809637).

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111774 + ... + 117630.

It is an arithmetic number, because the mean of its divisors is an integer number (48012168).

Almost surely, 2^671809614 is an apocalyptic number.

671809614 is an abundant number, since it is smaller than the sum of its proper divisors (864579762).

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

671809614 is a wasteful number, since it uses less digits than its factorization.

671809614 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8600.

The product of its (nonzero) digits is 72576, while the sum is 42.

The square root of 671809614 is about 25919.2903838049. The cubic root of 671809614 is about 875.8211019969.

The spelling of 671809614 in words is "six hundred seventy-one million, eight hundred nine thousand, six hundred fourteen".