782274548821 has 2 divisors, whose sum is σ = 782274548822. Its totient is φ = 782274548820.

The previous prime is 782274548819. The next prime is 782274548837. The reversal of 782274548821 is 128845472287.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 732888375921 + 49386172900 = 856089^2 + 222230^2 .

It is a cyclic number.

It is not a de Polignac number, because 782274548821 - 2¹ = 782274548819 is a prime.

It is a super-2 number, since 2×782274548821² (a number of 25 digits) contains 22 as substring.

Together with 782274548819, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (782274548851) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391137274410 + 391137274411.

It is an arithmetic number, because the mean of its divisors is an integer number (391137274411).

Almost surely, 2^782274548821 is an apocalyptic number.

It is an amenable number.

782274548821 is a deficient number, since it is larger than the sum of its proper divisors (1).

782274548821 is an equidigital number, since it uses as much as digits as its factorization.

782274548821 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16056320, while the sum is 58.

The spelling of 782274548821 in words is "seven hundred eighty-two billion, two hundred seventy-four million, five hundred forty-eight thousand, eight hundred twenty-one".