396991645063 has 16 divisors (see below), whose sum is σ = 436246272000. Its totient is φ = 359053100640.

The previous prime is 396991645051. The next prime is 396991645079. The reversal of 396991645063 is 360546199693.

It is not a de Polignac number, because 396991645063 - 2⁵ = 396991645031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 396991644992 and 396991645010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (396991645013) 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, 1340863 + ... + 1609936.

It is an arithmetic number, because the mean of its divisors is an integer number (27265392000).

Almost surely, 2^396991645063 is an apocalyptic number.

396991645063 is a deficient number, since it is larger than the sum of its proper divisors (39254626937).

396991645063 is a wasteful number, since it uses less digits than its factorization.

396991645063 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2951022.

The product of its (nonzero) digits is 28343520, while the sum is 61.

The spelling of 396991645063 in words is "three hundred ninety-six billion, nine hundred ninety-one million, six hundred forty-five thousand, sixty-three".