655674551321 has 2 divisors, whose sum is σ = 655674551322. Its totient is φ = 655674551320.

The previous prime is 655674551293. The next prime is 655674551327. The reversal of 655674551321 is 123155476556.

655674551321 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 350458080025 + 305216471296 = 591995^2 + 552464^2 .

It is a cyclic number.

It is not a de Polignac number, because 655674551321 - 2³⁸ = 380796644377 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 655674551321.

It is not a weakly prime, because it can be changed into another prime (655674551327) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 327837275660 + 327837275661.

It is an arithmetic number, because the mean of its divisors is an integer number (327837275661).

Almost surely, 2^655674551321 is an apocalyptic number.

It is an amenable number.

655674551321 is a deficient number, since it is larger than the sum of its proper divisors (1).

655674551321 is an equidigital number, since it uses as much as digits as its factorization.

655674551321 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3780000, while the sum is 50.

It can be divided in two parts, 6556745 and 51321, that added together give a palindrome (6608066).

The spelling of 655674551321 in words is "six hundred fifty-five billion, six hundred seventy-four million, five hundred fifty-one thousand, three hundred twenty-one".