671517045 has 12 divisors (see below), whose sum is σ = 1163962956. Its totient is φ = 358142400.

The previous prime is 671517043. The next prime is 671517047. The reversal of 671517045 is 540715176.

It is an interprime number because it is at equal distance from previous prime (671517043) and next prime (671517047).

It can be written as a sum of positive squares in 2 ways, for example, as 83503044 + 588014001 = 9138^2 + 24249^2 .

It is not a de Polignac number, because 671517045 - 2¹ = 671517043 is a prime.

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671517043) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7461256 + ... + 7461345.

It is an arithmetic number, because the mean of its divisors is an integer number (96996913).

Almost surely, 2^671517045 is an apocalyptic number.

It is an amenable number.

671517045 is a deficient number, since it is larger than the sum of its proper divisors (492445911).

671517045 is a wasteful number, since it uses less digits than its factorization.

671517045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14922612 (or 14922609 counting only the distinct ones).

The product of its (nonzero) digits is 29400, while the sum is 36.

The square root of 671517045 is about 25913.6459225637. The cubic root of 671517045 is about 875.6939452825.

The spelling of 671517045 in words is "six hundred seventy-one million, five hundred seventeen thousand, forty-five".