773147725321 has 4 divisors (see below), whose sum is σ = 773192910852. Its totient is φ = 773102539792.

The previous prime is 773147725307. The next prime is 773147725409. The reversal of 773147725321 is 123527741377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 123527741377 = 2239 ⋅55170943.

It can be written as a sum of positive squares in 2 ways, for example, as 104409765625 + 668737959696 = 323125^2 + 817764^2 .

It is a cyclic number.

It is not a de Polignac number, because 773147725321 - 2¹⁷ = 773147594249 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (773147725121) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22567090 + ... + 22601323.

It is an arithmetic number, because the mean of its divisors is an integer number (193298227713).

Almost surely, 2^773147725321 is an apocalyptic number.

It is an amenable number.

773147725321 is a deficient number, since it is larger than the sum of its proper divisors (45185531).

773147725321 is a wasteful number, since it uses less digits than its factorization.

773147725321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45185530.

The product of its digits is 1728720, while the sum is 49.

The spelling of 773147725321 in words is "seven hundred seventy-three billion, one hundred forty-seven million, seven hundred twenty-five thousand, three hundred twenty-one".