678281463553 has 2 divisors, whose sum is σ = 678281463554. Its totient is φ = 678281463552.

The previous prime is 678281463551. The next prime is 678281463577. The reversal of 678281463553 is 355364182876.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 615929875344 + 62351588209 = 784812^2 + 249703^2 .

It is a cyclic number.

It is not a de Polignac number, because 678281463553 - 2¹ = 678281463551 is a prime.

Together with 678281463551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (678281463551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 339140731776 + 339140731777.

It is an arithmetic number, because the mean of its divisors is an integer number (339140731777).

Almost surely, 2^678281463553 is an apocalyptic number.

It is an amenable number.

678281463553 is a deficient number, since it is larger than the sum of its proper divisors (1).

678281463553 is an equidigital number, since it uses as much as digits as its factorization.

678281463553 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 29030400, while the sum is 58.

The spelling of 678281463553 in words is "six hundred seventy-eight billion, two hundred eighty-one million, four hundred sixty-three thousand, five hundred fifty-three".