478692111997 has 6 divisors (see below), whose sum is σ = 526165710014. Its totient is φ = 435174647160.

The previous prime is 478692111917. The next prime is 478692112009. The reversal of 478692111997 is 799111296874.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 474563920996 + 4128191001 = 688886^2 + 64251^2 .

It is not a de Polignac number, because 478692111997 - 2³¹ = 476544628349 is a prime.

It is a super-2 number, since 2×478692111997² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (478692111917) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1978066458 + ... + 1978066699.

Almost surely, 2^478692111997 is an apocalyptic number.

It is an amenable number.

478692111997 is a deficient number, since it is larger than the sum of its proper divisors (47473598017).

478692111997 is a wasteful number, since it uses less digits than its factorization.

478692111997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3956133179 (or 3956133168 counting only the distinct ones).

The product of its digits is 13716864, while the sum is 64.

The spelling of 478692111997 in words is "four hundred seventy-eight billion, six hundred ninety-two million, one hundred eleven thousand, nine hundred ninety-seven".