400861194496 has 81 divisors (see below), whose sum is σ = 930959009001. Its totient is φ = 171767264256.

The previous prime is 400861194493. The next prime is 400861194509. The reversal of 400861194496 is 694491168004.

The square root of 400861194496 is 633136.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in only one way, i.e., 314227513600 + 86633680896 = 560560^2 + 294336^2 .

It is not an unprimeable number, because it can be changed into a prime (400861194491) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 70908406 + ... + 70914058.

Almost surely, 2^400861194496 is an apocalyptic number.

400861194496 is the 633136-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400861194496

400861194496 is an abundant number, since it is smaller than the sum of its proper divisors (530097814505).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400861194496 is an frugal number, since it uses more digits than its factorization.

400861194496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11336 (or 5662 counting only the distinct ones).

The product of its (nonzero) digits is 1492992, while the sum is 52.

The spelling of 400861194496 in words is "four hundred billion, eight hundred sixty-one million, one hundred ninety-four thousand, four hundred ninety-six".