64403630446 has 8 divisors (see below), whose sum is σ = 99721750464. Its totient is φ = 31163046960.

The previous prime is 64403630443. The next prime is 64403630513.

It is a happy number.

64403630446 is nontrivially palindromic in base 10.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×64403630446² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64403630399 and 64403630408.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64403630443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 519384055 + ... + 519384178.

It is an arithmetic number, because the mean of its divisors is an integer number (12465218808).

Almost surely, 2^64403630446 is an apocalyptic number.

64403630446 is a deficient number, since it is larger than the sum of its proper divisors (35318120018).

64403630446 is a wasteful number, since it uses less digits than its factorization.

64403630446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1038768266.

The product of its (nonzero) digits is 497664, while the sum is 40.

The spelling of 64403630446 in words is "sixty-four billion, four hundred three million, six hundred thirty thousand, four hundred forty-six".