671736241 has 32 divisors (see below), whose sum is σ = 801792000. Its totient is φ = 555984000.

The previous prime is 671736217. The next prime is 671736259. The reversal of 671736241 is 142637176.

It is a de Polignac number, because none of the positive numbers 2^k-671736241 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 671736241.

It is not an unprimeable number, because it can be changed into a prime (671736271) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1289061 + ... + 1289581.

It is an arithmetic number, because the mean of its divisors is an integer number (25056000).

Almost surely, 2^671736241 is an apocalyptic number.

It is an amenable number.

671736241 is a deficient number, since it is larger than the sum of its proper divisors (130055759).

671736241 is a wasteful number, since it uses less digits than its factorization.

671736241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 781.

The product of its digits is 42336, while the sum is 37.

The square root of 671736241 is about 25917.8749321776. The cubic root of 671736241 is about 875.7892159982.

The spelling of 671736241 in words is "six hundred seventy-one million, seven hundred thirty-six thousand, two hundred forty-one".