14021771970817 has 8 divisors (see below), whose sum is σ = 15100819954920. Its totient is φ = 12942788292480.

The previous prime is 14021771970781. The next prime is 14021771970841. The reversal of 14021771970817 is 71807917712041.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1724097676401 + 12297674294416 = 1313049^2 + 3506804^2 .

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 14021771970817 - 2²³ = 14021763582209 is a prime.

It is a super-2 number, since 2×14021771970817² (a number of 27 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (14021771970887) 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, 15623092 + ... + 16496197.

It is an arithmetic number, because the mean of its divisors is an integer number (1887602494365).

Almost surely, 2^{14021771970817} is an apocalyptic number.

It is an amenable number.

14021771970817 is a deficient number, since it is larger than the sum of its proper divisors (1079047984103).

14021771970817 is a wasteful number, since it uses less digits than its factorization.

14021771970817 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32152883.

The product of its (nonzero) digits is 1382976, while the sum is 55.

The spelling of 14021771970817 in words is "fourteen trillion, twenty-one billion, seven hundred seventy-one million, nine hundred seventy thousand, eight hundred seventeen".