671735545 has 8 divisors (see below), whose sum is σ = 868089096. Its totient is φ = 496050816.

The previous prime is 671735543. The next prime is 671735563. The reversal of 671735545 is 545537176.

It can be written as a sum of positive squares in 4 ways, for example, as 8982009 + 662753536 = 2997^2 + 25744^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 671735545 - 2¹ = 671735543 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (671735543) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5167132 + ... + 5167261.

It is an arithmetic number, because the mean of its divisors is an integer number (108511137).

Almost surely, 2^671735545 is an apocalyptic number.

671735545 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

It is an amenable number.

671735545 is a deficient number, since it is larger than the sum of its proper divisors (196353551).

671735545 is a wasteful number, since it uses less digits than its factorization.

671735545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10334411.

The product of its digits is 441000, while the sum is 43.

The square root of 671735545 is about 25917.8615051474. The cubic root of 671735545 is about 875.7889135236.

The spelling of 671735545 in words is "six hundred seventy-one million, seven hundred thirty-five thousand, five hundred forty-five".