63451205551 has 2 divisors, whose sum is σ = 63451205552. Its totient is φ = 63451205550.

The previous prime is 63451205491. The next prime is 63451205567. The reversal of 63451205551 is 15550215436.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 63451205551 - 2⁷ = 63451205423 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 63451205551.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (63451205351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31725602775 + 31725602776.

It is an arithmetic number, because the mean of its divisors is an integer number (31725602776).

Almost surely, 2^63451205551 is an apocalyptic number.

63451205551 is a deficient number, since it is larger than the sum of its proper divisors (1).

63451205551 is an equidigital number, since it uses as much as digits as its factorization.

63451205551 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 90000, while the sum is 37.

The spelling of 63451205551 in words is "sixty-three billion, four hundred fifty-one million, two hundred five thousand, five hundred fifty-one".