64390025446 has 8 divisors (see below), whose sum is σ = 99195444720. Its totient is φ = 31324877208.

The previous prime is 64390025411. The next prime is 64390025449. The reversal of 64390025446 is 64452009346.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64390025449) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 435067666 + ... + 435067813.

It is an arithmetic number, because the mean of its divisors is an integer number (12399430590).

Almost surely, 2^64390025446 is an apocalyptic number.

64390025446 is a deficient number, since it is larger than the sum of its proper divisors (34805419274).

64390025446 is a wasteful number, since it uses less digits than its factorization.

64390025446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870135518.

The product of its (nonzero) digits is 622080, while the sum is 43.

The spelling of 64390025446 in words is "sixty-four billion, three hundred ninety million, twenty-five thousand, four hundred forty-six".