404165388723 has 12 divisors (see below), whose sum is σ = 542341549080. Its totient is φ = 267727342272.

The previous prime is 404165388721. The next prime is 404165388749. The reversal of 404165388723 is 327883561404.

It is a happy number.

It is not a de Polignac number, because 404165388723 - 2¹ = 404165388721 is a prime.

It is a super-2 number, since 2×404165388723² (a number of 24 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (404165388721) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2658858 + ... + 2806751.

It is an arithmetic number, because the mean of its divisors is an integer number (45195129090).

Almost surely, 2^404165388723 is an apocalyptic number.

404165388723 is a deficient number, since it is larger than the sum of its proper divisors (138176160357).

404165388723 is an equidigital number, since it uses as much as digits as its factorization.

404165388723 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5465926 (or 5465769 counting only the distinct ones).

The product of its (nonzero) digits is 3870720, while the sum is 51.

The spelling of 404165388723 in words is "four hundred four billion, one hundred sixty-five million, three hundred eighty-eight thousand, seven hundred twenty-three".