794881016721 has 27 divisors (see below), whose sum is σ = 1262075435803. Its totient is φ = 481728239520.

The previous prime is 794881016707. The next prime is 794881016759. The reversal of 794881016721 is 127610188497.

The square root of 794881016721 is 891561.

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

794881016721 is a `hidden beast` number, since 79 + 488 + 10 + 1 + 67 + 21 = 666.

It can be written as a sum of positive squares in only one way, i.e., 780704780625 + 14176236096 = 883575^2 + 119064^2 .

It is not a de Polignac number, because 794881016721 - 2⁷ = 794881016593 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (794881016521) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 29408005 + ... + 29435021.

Almost surely, 2^794881016721 is an apocalyptic number.

794881016721 is the 891561-st square number.

794881016721 is the 445781-st centered octagonal number.

It is an amenable number.

794881016721 is a deficient number, since it is larger than the sum of its proper divisors (467194419082).

794881016721 is an frugal number, since it uses more digits than its factorization.

794881016721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54062 (or 27031 counting only the distinct ones).

The product of its (nonzero) digits is 1354752, while the sum is 54.

It can be divided in two parts, 79488 and 1016721, that added together give a square (1096209 = 1047²).

The spelling of 794881016721 in words is "seven hundred ninety-four billion, eight hundred eighty-one million, sixteen thousand, seven hundred twenty-one".