64420440422 has 48 divisors (see below), whose sum is σ = 109261716480. Its totient is φ = 28419801696.

The previous prime is 64420440419. The next prime is 64420440433. The reversal of 64420440422 is 22404402446.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 19176779 + ... + 19180137.

It is an arithmetic number, because the mean of its divisors is an integer number (2276285760).

Almost surely, 2^64420440422 is an apocalyptic number.

64420440422 is a deficient number, since it is larger than the sum of its proper divisors (44841276058).

64420440422 is a wasteful number, since it uses less digits than its factorization.

64420440422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5877 (or 5864 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 32.

Adding to 64420440422 its reverse (22404402446), we get a palindrome (86824842868).

The spelling of 64420440422 in words is "sixty-four billion, four hundred twenty million, four hundred forty thousand, four hundred twenty-two".