478220811397 has 16 divisors (see below), whose sum is σ = 569645719552. Its totient is φ = 392829568560.

The previous prime is 478220811323. The next prime is 478220811401. The reversal of 478220811397 is 793118022874.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-478220811397 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478220812397) 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, 10675623 + ... + 10720324.

It is an arithmetic number, because the mean of its divisors is an integer number (35602857472).

Almost surely, 2^478220811397 is an apocalyptic number.

It is an amenable number.

478220811397 is a deficient number, since it is larger than the sum of its proper divisors (91424908155).

478220811397 is a wasteful number, since it uses less digits than its factorization.

478220811397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21396088.

The product of its (nonzero) digits is 1354752, while the sum is 52.

The spelling of 478220811397 in words is "four hundred seventy-eight billion, two hundred twenty million, eight hundred eleven thousand, three hundred ninety-seven".