397812385444769 has 16 divisors (see below), whose sum is σ = 409172902427520. Its totient is φ = 386531591495040.

The previous prime is 397812385444723. The next prime is 397812385444787. The reversal of 397812385444769 is 967444583218793.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397812385444769 is a prime.

It is a super-2 number, since 2×397812385444769² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 397812385444693 and 397812385444702.

It is not an unprimeable number, because it can be changed into a prime (397812385441769) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35867699 + ... + 45630215.

It is an arithmetic number, because the mean of its divisors is an integer number (25573306401720).

Almost surely, 2^{397812385444769} is an apocalyptic number.

It is an amenable number.

397812385444769 is a deficient number, since it is larger than the sum of its proper divisors (11360516982751).

397812385444769 is a wasteful number, since it uses less digits than its factorization.

397812385444769 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9766600.

The product of its digits is 8778792960, while the sum is 80.

The spelling of 397812385444769 in words is "three hundred ninety-seven trillion, eight hundred twelve billion, three hundred eighty-five million, four hundred forty-four thousand, seven hundred sixty-nine".