77254955321 has 2 divisors, whose sum is σ = 77254955322. Its totient is φ = 77254955320.

The previous prime is 77254955293. The next prime is 77254955359. The reversal of 77254955321 is 12355945277.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 48516229696 + 28738725625 = 220264^2 + 169525^2 .

It is a cyclic number.

It is not a de Polignac number, because 77254955321 - 2⁶ = 77254955257 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 77254955321.

It is not a weakly prime, because it can be changed into another prime (77254955381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38627477660 + 38627477661.

It is an arithmetic number, because the mean of its divisors is an integer number (38627477661).

Almost surely, 2^77254955321 is an apocalyptic number.

It is an amenable number.

77254955321 is a deficient number, since it is larger than the sum of its proper divisors (1).

77254955321 is an equidigital number, since it uses as much as digits as its factorization.

77254955321 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2646000, while the sum is 50.

The spelling of 77254955321 in words is "seventy-seven billion, two hundred fifty-four million, nine hundred fifty-five thousand, three hundred twenty-one".