671638480695 has 96 divisors (see below), whose sum is σ = 1485896735232. Its totient is φ = 283416630912.

The previous prime is 671638480673. The next prime is 671638480703. The reversal of 671638480695 is 596084836176.

671638480695 is a `hidden beast` number, since 6 + 7 + 1 + 63 + 8 + 480 + 6 + 95 = 666.

It is not a de Polignac number, because 671638480695 - 2¹² = 671638476599 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 2926737 + ... + 3147866.

It is an arithmetic number, because the mean of its divisors is an integer number (15478090992).

Almost surely, 2^671638480695 is an apocalyptic number.

671638480695 is a gapful number since it is divisible by the number (65) formed by its first and last digit.

671638480695 is an abundant number, since it is smaller than the sum of its proper divisors (814258254537).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

671638480695 is a wasteful number, since it uses less digits than its factorization.

671638480695 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6074643 (or 6074631 counting only the distinct ones).

The product of its (nonzero) digits is 52254720, while the sum is 63.

The spelling of 671638480695 in words is "six hundred seventy-one billion, six hundred thirty-eight million, four hundred eighty thousand, six hundred ninety-five".