397809705465 has 32 divisors (see below), whose sum is σ = 708897206400. Its totient is φ = 211661190720.

The previous prime is 397809705443. The next prime is 397809705467. The reversal of 397809705465 is 564507908793.

397809705465 is a `hidden beast` number, since 3 + 9 + 7 + 80 + 9 + 7 + 0 + 546 + 5 = 666.

It is not a de Polignac number, because 397809705465 - 2¹² = 397809701369 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397809705467) 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 31 ways as a sum of consecutive naturals, for example, 3442855 + ... + 3556524.

It is an arithmetic number, because the mean of its divisors is an integer number (22153037700).

Almost surely, 2^397809705465 is an apocalyptic number.

It is an amenable number.

397809705465 is a deficient number, since it is larger than the sum of its proper divisors (311087500935).

397809705465 is a wasteful number, since it uses less digits than its factorization.

397809705465 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6999814 (or 6999808 counting only the distinct ones).

The product of its (nonzero) digits is 57153600, while the sum is 63.

The spelling of 397809705465 in words is "three hundred ninety-seven billion, eight hundred nine million, seven hundred five thousand, four hundred sixty-five".