64450405446 has 32 divisors (see below), whose sum is σ = 152395050240. Its totient is φ = 17779421856.

The previous prime is 64450405421. The next prime is 64450405463.

64450405446 is nontrivially palindromic in base 10.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64450405398 and 64450405407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26456256 + ... + 26458691.

It is an arithmetic number, because the mean of its divisors is an integer number (4762345320).

Almost surely, 2^64450405446 is an apocalyptic number.

64450405446 is an abundant number, since it is smaller than the sum of its proper divisors (87944644794).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64450405446 is a wasteful number, since it uses less digits than its factorization.

64450405446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52914988.

The product of its (nonzero) digits is 921600, while the sum is 42.

The spelling of 64450405446 in words is "sixty-four billion, four hundred fifty million, four hundred five thousand, four hundred forty-six".