397895065841 has 16 divisors (see below), whose sum is σ = 489802919424. Its totient is φ = 314762842944.

The previous prime is 397895065781. The next prime is 397895065891. The reversal of 397895065841 is 148560598793.

It is a cyclic number.

It is not a de Polignac number, because 397895065841 - 2¹⁸ = 397894803697 is a prime.

It is a super-2 number, since 2×397895065841² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (397895065891) 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, 141935 + ... + 903291.

It is an arithmetic number, because the mean of its divisors is an integer number (30612682464).

Almost surely, 2^397895065841 is an apocalyptic number.

It is an amenable number.

397895065841 is a deficient number, since it is larger than the sum of its proper divisors (91907853583).

397895065841 is a wasteful number, since it uses less digits than its factorization.

397895065841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 767120.

The product of its (nonzero) digits is 65318400, while the sum is 65.

The spelling of 397895065841 in words is "three hundred ninety-seven billion, eight hundred ninety-five million, sixty-five thousand, eight hundred forty-one".