671647100109 has 16 divisors (see below), whose sum is σ = 903873801600. Its totient is φ = 443593734336.

The previous prime is 671647100093. The next prime is 671647100147. The reversal of 671647100109 is 901001746176.

It is not a de Polignac number, because 671647100109 - 2⁴ = 671647100093 is a prime.

It is a super-2 number, since 2×671647100109² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (671647100209) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2216272 + ... + 2501030.

It is an arithmetic number, because the mean of its divisors is an integer number (56492112600).

Almost surely, 2^671647100109 is an apocalyptic number.

It is an amenable number.

671647100109 is a deficient number, since it is larger than the sum of its proper divisors (232226701491).

671647100109 is a wasteful number, since it uses less digits than its factorization.

671647100109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292084.

The product of its (nonzero) digits is 63504, while the sum is 42.

The spelling of 671647100109 in words is "six hundred seventy-one billion, six hundred forty-seven million, one hundred thousand, one hundred nine".