405236640466 has 16 divisors (see below), whose sum is σ = 694704358656. Its totient is φ = 173669602176.

The previous prime is 405236640451. The next prime is 405236640469. The reversal of 405236640466 is 664046632504.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (405236640469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 603415 + ... + 1083781.

It is an arithmetic number, because the mean of its divisors is an integer number (43419022416).

Almost surely, 2^405236640466 is an apocalyptic number.

405236640466 is a deficient number, since it is larger than the sum of its proper divisors (289467718190).

405236640466 is a wasteful number, since it uses less digits than its factorization.

405236640466 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 540633.

The product of its (nonzero) digits is 2488320, while the sum is 46.

The spelling of 405236640466 in words is "four hundred five billion, two hundred thirty-six million, six hundred forty thousand, four hundred sixty-six".