671505155 has 16 divisors (see below), whose sum is σ = 821352960. Its totient is φ = 526909152.

The previous prime is 671505139. The next prime is 671505161. The reversal of 671505155 is 551505176.

It is a cyclic number.

It is not a de Polignac number, because 671505155 - 2⁴ = 671505139 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75872 + ... + 84258.

It is an arithmetic number, because the mean of its divisors is an integer number (51334560).

Almost surely, 2^671505155 is an apocalyptic number.

671505155 is a deficient number, since it is larger than the sum of its proper divisors (149847805).

671505155 is a wasteful number, since it uses less digits than its factorization.

671505155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8698.

The product of its (nonzero) digits is 26250, while the sum is 35.

The square root of 671505155 is about 25913.4165057408. The cubic root of 671505155 is about 875.6887768545.

The spelling of 671505155 in words is "six hundred seventy-one million, five hundred five thousand, one hundred fifty-five".