406406646404 has 24 divisors (see below), whose sum is σ = 775916064000. Its totient is φ = 184718667680.

The previous prime is 406406646403. The next prime is 406406646427. The reversal of 406406646404 is 404646604604.

It is a super-2 number, since 2×406406646404² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is not an unprimeable number, because it can be changed into a prime (406406646403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 436877 + ... + 1001835.

It is an arithmetic number, because the mean of its divisors is an integer number (32329836000).

Almost surely, 2^406406646404 is an apocalyptic number.

406406646404 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

406406646404 is a deficient number, since it is larger than the sum of its proper divisors (369509417596).

406406646404 is a wasteful number, since it uses less digits than its factorization.

406406646404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 581323 (or 581321 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 406406646404 in words is "four hundred six billion, four hundred six million, six hundred forty-six thousand, four hundred four".