64424021252 has 24 divisors (see below), whose sum is σ = 114505619424. Its totient is φ = 31708809792.

The previous prime is 64424021227. The next prime is 64424021273. The reversal of 64424021252 is 25212042446.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 298208 + ... + 466664.

It is an arithmetic number, because the mean of its divisors is an integer number (4771067476).

Almost surely, 2^64424021252 is an apocalyptic number.

It is an amenable number.

64424021252 is a deficient number, since it is larger than the sum of its proper divisors (50081598172).

64424021252 is a wasteful number, since it uses less digits than its factorization.

64424021252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169955 (or 169953 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 32.

Adding to 64424021252 its reverse (25212042446), we get a palindrome (89636063698).

The spelling of 64424021252 in words is "sixty-four billion, four hundred twenty-four million, twenty-one thousand, two hundred fifty-two".