400545634505 has 8 divisors (see below), whose sum is σ = 483433113672. Its totient is φ = 318584272768.

The previous prime is 400545634469. The next prime is 400545634549. The reversal of 400545634505 is 505436545004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 102843358864 + 297702275641 = 320692^2 + 545621^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400545634505 - 2¹² = 400545630409 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 231528404 + ... + 231530133.

It is an arithmetic number, because the mean of its divisors is an integer number (60429139209).

Almost surely, 2^400545634505 is an apocalyptic number.

It is an amenable number.

400545634505 is a deficient number, since it is larger than the sum of its proper divisors (82887479167).

400545634505 is a wasteful number, since it uses less digits than its factorization.

400545634505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 463058715.

The product of its (nonzero) digits is 720000, while the sum is 41.

The spelling of 400545634505 in words is "four hundred billion, five hundred forty-five million, six hundred thirty-four thousand, five hundred five".