671955215 has 8 divisors (see below), whose sum is σ = 806884848. Its totient is φ = 537205120.

The previous prime is 671955203. The next prime is 671955233. The reversal of 671955215 is 512559176.

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

It is not a de Polignac number, because 671955215 - 2¹⁶ = 671889679 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36506 + ... + 51735.

It is an arithmetic number, because the mean of its divisors is an integer number (100860606).

Almost surely, 2^671955215 is an apocalyptic number.

671955215 is a deficient number, since it is larger than the sum of its proper divisors (134929633).

671955215 is a wasteful number, since it uses less digits than its factorization.

671955215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 89769.

The product of its digits is 94500, while the sum is 41.

The square root of 671955215 is about 25922.0989697980. The cubic root of 671955215 is about 875.8843695329.

The spelling of 671955215 in words is "six hundred seventy-one million, nine hundred fifty-five thousand, two hundred fifteen".