803961496321 has 9 divisors (see below), whose sum is σ = 817412863683. Its totient is φ = 790728001320.

The previous prime is 803961496309. The next prime is 803961496337. The reversal of 803961496321 is 123694169308.

It is a happy number.

The square root of 803961496321 is 896639.

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., 26143332721 + 777818163600 = 161689^2 + 881940^2 .

It is a de Polignac number, because none of the positive numbers 2^k-803961496321 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (803961496721) 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, 54687630 + ... + 54702328.

Almost surely, 2^803961496321 is an apocalyptic number.

803961496321 is the 896639-th square number.

803961496321 is the 448320-th centered octagonal number.

It is an amenable number.

803961496321 is a deficient number, since it is larger than the sum of its proper divisors (13451367362).

803961496321 is an frugal number, since it uses more digits than its factorization.

803961496321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29520 (or 14760 counting only the distinct ones).

The product of its (nonzero) digits is 1679616, while the sum is 52.

The spelling of 803961496321 in words is "eight hundred three billion, nine hundred sixty-one million, four hundred ninety-six thousand, three hundred twenty-one".