406451845646 has 64 divisors (see below), whose sum is σ = 770798094336. Its totient is φ = 156134304000.

The previous prime is 406451845643. The next prime is 406451845669. The reversal of 406451845646 is 646548154604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (406451845643) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 50168996 + ... + 50177096.

It is an arithmetic number, because the mean of its divisors is an integer number (12043720224).

Almost surely, 2^406451845646 is an apocalyptic number.

406451845646 is a deficient number, since it is larger than the sum of its proper divisors (364346248690).

406451845646 is a wasteful number, since it uses less digits than its factorization.

406451845646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12657.

The product of its (nonzero) digits is 11059200, while the sum is 53.

The spelling of 406451845646 in words is "four hundred six billion, four hundred fifty-one million, eight hundred forty-five thousand, six hundred forty-six".