671511249 has 16 divisors (see below), whose sum is σ = 997696000. Its totient is φ = 446385168.

The previous prime is 671511229. The next prime is 671511283. The reversal of 671511249 is 942115176.

It is not a de Polignac number, because 671511249 - 2¹⁹ = 670986961 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671511209) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26209 + ... + 45054.

It is an arithmetic number, because the mean of its divisors is an integer number (62356000).

Almost surely, 2^671511249 is an apocalyptic number.

It is an amenable number.

671511249 is a deficient number, since it is larger than the sum of its proper divisors (326184751).

671511249 is a wasteful number, since it uses less digits than its factorization.

671511249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71621 (or 71615 counting only the distinct ones).

The product of its digits is 15120, while the sum is 36.

The square root of 671511249 is about 25913.5340893518. The cubic root of 671511249 is about 875.6914258445.

The spelling of 671511249 in words is "six hundred seventy-one million, five hundred eleven thousand, two hundred forty-nine".