671548555 has 4 divisors (see below), whose sum is σ = 805858272. Its totient is φ = 537238840.

The previous prime is 671548543. The next prime is 671548589. The reversal of 671548555 is 555845176.

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

It is not a de Polignac number, because 671548555 - 2⁵ = 671548523 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67154851 + ... + 67154860.

It is an arithmetic number, because the mean of its divisors is an integer number (201464568).

Almost surely, 2^671548555 is an apocalyptic number.

671548555 is a deficient number, since it is larger than the sum of its proper divisors (134309717).

671548555 is a wasteful number, since it uses less digits than its factorization.

671548555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134309716.

The product of its digits is 840000, while the sum is 46.

The square root of 671548555 is about 25914.2538962633. The cubic root of 671548555 is about 875.7076419736.

The spelling of 671548555 in words is "six hundred seventy-one million, five hundred forty-eight thousand, five hundred fifty-five".