400434176862721 has 8 divisors (see below), whose sum is σ = 417860182341504. Its totient is φ = 383009490040320.

The previous prime is 400434176862719. The next prime is 400434176862739. The reversal of 400434176862721 is 127268671434004.

It is a happy number.

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 400434176862721 - 2¹ = 400434176862719 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400434176862751) 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, 329043520 + ... + 330258241.

It is an arithmetic number, because the mean of its divisors is an integer number (52232522792688).

Almost surely, 2^{400434176862721} is an apocalyptic number.

It is an amenable number.

400434176862721 is a deficient number, since it is larger than the sum of its proper divisors (17426005478783).

400434176862721 is a wasteful number, since it uses less digits than its factorization.

400434176862721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 659328191.

The product of its (nonzero) digits is 10838016, while the sum is 55.

The spelling of 400434176862721 in words is "four hundred trillion, four hundred thirty-four billion, one hundred seventy-six million, eight hundred sixty-two thousand, seven hundred twenty-one".