671218053 has 8 divisors (see below), whose sum is σ = 976317216. Its totient is φ = 406798800.

The previous prime is 671218033. The next prime is 671218063. The reversal of 671218053 is 350812176.

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

It is not a de Polignac number, because 671218053 - 2¹² = 671213957 is a prime.

It is a super-2 number, since 2×671218053² = 901067349346221618, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 20339941 = 671218053 / (6 + 7 + 1 + 2 + 1 + 8 + 0 + 5 + 3).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671218013) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10169938 + ... + 10170003.

It is an arithmetic number, because the mean of its divisors is an integer number (122039652).

Almost surely, 2^671218053 is an apocalyptic number.

It is an amenable number.

671218053 is a deficient number, since it is larger than the sum of its proper divisors (305099163).

671218053 is a wasteful number, since it uses less digits than its factorization.

671218053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20339955.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 671218053 is about 25907.8762734424. The cubic root of 671218053 is about 875.5639588313.

The spelling of 671218053 in words is "six hundred seventy-one million, two hundred eighteen thousand, fifty-three".