397886662816 has 12 divisors (see below), whose sum is σ = 783339367482. Its totient is φ = 198943331392.

The previous prime is 397886662813. The next prime is 397886662843. The reversal of 397886662816 is 618266688793.

It can be written as a sum of positive squares in only one way, i.e., 397883408400 + 3254416 = 630780^2 + 1804^2 .

It is not an unprimeable number, because it can be changed into a prime (397886662813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6216979075 + ... + 6216979138.

Almost surely, 2^397886662816 is an apocalyptic number.

It is an amenable number.

397886662816 is a deficient number, since it is larger than the sum of its proper divisors (385452704666).

397886662816 is a wasteful number, since it uses less digits than its factorization.

397886662816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12433958223 (or 12433958215 counting only the distinct ones).

The product of its digits is 250822656, while the sum is 70.

The spelling of 397886662816 in words is "three hundred ninety-seven billion, eight hundred eighty-six million, six hundred sixty-two thousand, eight hundred sixteen".