64424509451 has 2 divisors, whose sum is σ = 64424509452. Its totient is φ = 64424509450.

The previous prime is 64424509417. The next prime is 64424509469. The reversal of 64424509451 is 15490542446.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 64424509451 - 2¹⁰ = 64424508427 is a prime.

It is not a weakly prime, because it can be changed into another prime (64424509151) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32212254725 + 32212254726.

It is an arithmetic number, because the mean of its divisors is an integer number (32212254726).

Almost surely, 2^64424509451 is an apocalyptic number.

64424509451 is a deficient number, since it is larger than the sum of its proper divisors (1).

64424509451 is an equidigital number, since it uses as much as digits as its factorization.

64424509451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 691200, while the sum is 44.

The spelling of 64424509451 in words is "sixty-four billion, four hundred twenty-four million, five hundred nine thousand, four hundred fifty-one".