671534240807 has 4 divisors (see below), whose sum is σ = 672294756120. Its totient is φ = 670773725496.

The previous prime is 671534240791. The next prime is 671534240813. The reversal of 671534240807 is 708042435176.

671534240807 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 671534240807 - 2⁴ = 671534240791 is a prime.

It is a super-2 number, since 2×671534240807² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671534240827) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 380256332 + ... + 380258097.

It is an arithmetic number, because the mean of its divisors is an integer number (168073689030).

Almost surely, 2^671534240807 is an apocalyptic number.

671534240807 is a deficient number, since it is larger than the sum of its proper divisors (760515313).

671534240807 is an equidigital number, since it uses as much as digits as its factorization.

671534240807 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 760515312.

The product of its (nonzero) digits is 1128960, while the sum is 47.

The spelling of 671534240807 in words is "six hundred seventy-one billion, five hundred thirty-four million, two hundred forty thousand, eight hundred seven".