671139955 has 16 divisors (see below), whose sum is σ = 816732000. Its totient is φ = 529390080.

The previous prime is 671139943. The next prime is 671139971. The reversal of 671139955 is 559931176.

It is not a de Polignac number, because 671139955 - 2⁷ = 671139827 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 100315 + ... + 106795.

It is an arithmetic number, because the mean of its divisors is an integer number (51045750).

Almost surely, 2^671139955 is an apocalyptic number.

671139955 is a deficient number, since it is larger than the sum of its proper divisors (145592045).

671139955 is a wasteful number, since it uses less digits than its factorization.

671139955 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6774.

The product of its digits is 255150, while the sum is 46.

The square root of 671139955 is about 25906.3690045518. The cubic root of 671139955 is about 875.5299994515.

The spelling of 671139955 in words is "six hundred seventy-one million, one hundred thirty-nine thousand, nine hundred fifty-five".