404287506669173 has 4 divisors (see below), whose sum is σ = 404287547576748. Its totient is φ = 404287465761600.

The previous prime is 404287506669143. The next prime is 404287506669191. The reversal of 404287506669173 is 371966605782404.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 329806774899889 + 74480731769284 = 18160583^2 + 8630222^2 .

It is a cyclic number.

It is not a de Polignac number, because 404287506669173 - 2⁸ = 404287506668917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (404287506669143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4600415 + ... + 28805187.

It is an arithmetic number, because the mean of its divisors is an integer number (101071886894187).

It is a 1-persistent number, because it is pandigital, but 2⋅404287506669173 = 808575013338346 is not.

Almost surely, 2^{404287506669173} is an apocalyptic number.

It is an amenable number.

404287506669173 is a deficient number, since it is larger than the sum of its proper divisors (40907575).

404287506669173 is a wasteful number, since it uses less digits than its factorization.

404287506669173 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40907574.

The product of its (nonzero) digits is 365783040, while the sum is 68.

The spelling of 404287506669173 in words is "four hundred four trillion, two hundred eighty-seven billion, five hundred six million, six hundred sixty-nine thousand, one hundred seventy-three".