64402020446 has 8 divisors (see below), whose sum is σ = 96604119720. Its totient is φ = 32200647208.

The previous prime is 64402020443. The next prime is 64402020451.

64402020446 is nontrivially palindromic in base 10.

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 (64402020443) 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, 204065 + ... + 412851.

It is an arithmetic number, because the mean of its divisors is an integer number (12075514965).

Almost surely, 2^64402020446 is an apocalyptic number.

64402020446 is a deficient number, since it is larger than the sum of its proper divisors (32202099274).

64402020446 is a wasteful number, since it uses less digits than its factorization.

64402020446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 363018.

The product of its (nonzero) digits is 36864, while the sum is 32.

It can be divided in two parts, 644020 and 20446, that added together give a palindrome (664466).

The spelling of 64402020446 in words is "sixty-four billion, four hundred two million, twenty thousand, four hundred forty-six".