783255633217 has 2 divisors, whose sum is σ = 783255633218. Its totient is φ = 783255633216.

The previous prime is 783255633203. The next prime is 783255633221. The reversal of 783255633217 is 712336552387.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 424108327696 + 359147305521 = 651236^2 + 599289^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-783255633217 is a prime.

It is a super-2 number, since 2×783255633217² (a number of 25 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (783255633247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 391627816608 + 391627816609.

It is an arithmetic number, because the mean of its divisors is an integer number (391627816609).

Almost surely, 2^783255633217 is an apocalyptic number.

It is an amenable number.

783255633217 is a deficient number, since it is larger than the sum of its proper divisors (1).

783255633217 is an equidigital number, since it uses as much as digits as its factorization.

783255633217 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6350400, while the sum is 52.

The spelling of 783255633217 in words is "seven hundred eighty-three billion, two hundred fifty-five million, six hundred thirty-three thousand, two hundred seventeen".