804664614961 has 9 divisors (see below), whose sum is σ = 813888127531. Its totient is φ = 795544500784.

The previous prime is 804664614959. The next prime is 804664614973. The reversal of 804664614961 is 169416466408.

The square root of 804664614961 is 897031.

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., 154512672561 + 650151942400 = 393081^2 + 806320^2 .

It is not a de Polignac number, because 804664614961 - 2¹ = 804664614959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (804664614911) 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, 79830720 + ... + 79840798.

Almost surely, 2^804664614961 is an apocalyptic number.

804664614961 is the 897031-st square number.

804664614961 is the 448516-th centered octagonal number.

It is an amenable number.

804664614961 is a deficient number, since it is larger than the sum of its proper divisors (9223512570).

804664614961 is an frugal number, since it uses more digits than its factorization.

804664614961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20336 (or 10168 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 55.

The spelling of 804664614961 in words is "eight hundred four billion, six hundred sixty-four million, six hundred fourteen thousand, nine hundred sixty-one".