64642024619 has 2 divisors, whose sum is σ = 64642024620. Its totient is φ = 64642024618.

The previous prime is 64642024589. The next prime is 64642024673. The reversal of 64642024619 is 91642024646.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64642024619 is a prime.

It is a super-2 number, since 2×64642024619² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 64642024619.

It is not a weakly prime, because it can be changed into another prime (64642024519) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32321012309 + 32321012310.

It is an arithmetic number, because the mean of its divisors is an integer number (32321012310).

Almost surely, 2^64642024619 is an apocalyptic number.

64642024619 is a deficient number, since it is larger than the sum of its proper divisors (1).

64642024619 is an equidigital number, since it uses as much as digits as its factorization.

64642024619 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 497664, while the sum is 44.

The spelling of 64642024619 in words is "sixty-four billion, six hundred forty-two million, twenty-four thousand, six hundred nineteen".