3971495856469 has 8 divisors (see below), whose sum is σ = 3974115304280. Its totient is φ = 3968876620800.

The previous prime is 3971495856467. The next prime is 3971495856499. The reversal of 3971495856469 is 9646585941793.

It can be written as a sum of positive squares in 4 ways, for example, as 861299075844 + 3110196780625 = 928062^2 + 1763575^2 .

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 3971495856469 - 2¹ = 3971495856467 is a prime.

It is a super-2 number, since 2×3971495856469² (a number of 26 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 3971495856395 and 3971495856404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3971495856463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 57622909 + ... + 57691789.

It is an arithmetic number, because the mean of its divisors is an integer number (496764413035).

Almost surely, 2^{3971495856469} is an apocalyptic number.

It is an amenable number.

3971495856469 is a deficient number, since it is larger than the sum of its proper divisors (2619447811).

3971495856469 is a wasteful number, since it uses less digits than its factorization.

3971495856469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106071.

The product of its digits is 1763596800, while the sum is 76.

The spelling of 3971495856469 in words is "three trillion, nine hundred seventy-one billion, four hundred ninety-five million, eight hundred fifty-six thousand, four hundred sixty-nine".