13671856637 has 8 divisors (see below), whose sum is σ = 14477200056. Its totient is φ = 12866637312.

The previous prime is 13671856633. The next prime is 13671856651. The reversal of 13671856637 is 73665817631.

It can be written as a sum of positive squares in 4 ways, for example, as 1268356996 + 12403499641 = 35614^2 + 111371^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 13671856637 - 2² = 13671856633 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13671856633) 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, 291983 + ... + 335555.

It is an arithmetic number, because the mean of its divisors is an integer number (1809650007).

Almost surely, 2^13671856637 is an apocalyptic number.

13671856637 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

13671856637 is a deficient number, since it is larger than the sum of its proper divisors (805343419).

13671856637 is a wasteful number, since it uses less digits than its factorization.

13671856637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62047.

The product of its digits is 3810240, while the sum is 53.

The spelling of 13671856637 in words is "thirteen billion, six hundred seventy-one million, eight hundred fifty-six thousand, six hundred thirty-seven".