671489655 has 8 divisors (see below), whose sum is σ = 1074383472. Its totient is φ = 358127808.

The previous prime is 671489641. The next prime is 671489711. The reversal of 671489655 is 556984176.

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

It is a de Polignac number, because none of the positive numbers 2^k-671489655 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 671489598 and 671489607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 22382974 + ... + 22383003.

It is an arithmetic number, because the mean of its divisors is an integer number (134297934).

Almost surely, 2^671489655 is an apocalyptic number.

671489655 is a deficient number, since it is larger than the sum of its proper divisors (402893817).

671489655 is a wasteful number, since it uses less digits than its factorization.

671489655 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44765985.

The product of its digits is 1814400, while the sum is 51.

The square root of 671489655 is about 25913.1174311390. The cubic root of 671489655 is about 875.6820391150.

It can be divided in two parts, 6714 and 89655, that added together give a palindrome (96369).

The spelling of 671489655 in words is "six hundred seventy-one million, four hundred eighty-nine thousand, six hundred fifty-five".