14071639681 has 4 divisors (see below), whose sum is σ = 15350879664. Its totient is φ = 12792399700.

The previous prime is 14071639667. The next prime is 14071639693. The reversal of 14071639681 is 18693617041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 14071639681 - 2¹⁹ = 14071115393 is a prime.

It is a super-2 number, since 2×14071639681² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14071639081) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 639619975 + ... + 639619996.

It is an arithmetic number, because the mean of its divisors is an integer number (3837719916).

Almost surely, 2^14071639681 is an apocalyptic number.

14071639681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

14071639681 is a deficient number, since it is larger than the sum of its proper divisors (1279239983).

14071639681 is a wasteful number, since it uses less digits than its factorization.

14071639681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1279239982.

The product of its (nonzero) digits is 217728, while the sum is 46.

The spelling of 14071639681 in words is "fourteen billion, seventy-one million, six hundred thirty-nine thousand, six hundred eighty-one".