64402441216 has 22 divisors (see below), whose sum is σ = 128741991470. Its totient is φ = 32201220096.

The previous prime is 64402441199. The next prime is 64402441217. The reversal of 64402441216 is 61214420446.

64402441216 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 63956386816 + 446054400 = 252896^2 + 21120^2 .

It is not an unprimeable number, because it can be changed into a prime (64402441217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 31445481 + ... + 31447528.

Almost surely, 2^64402441216 is an apocalyptic number.

It is an amenable number.

64402441216 is a deficient number, since it is larger than the sum of its proper divisors (64339550254).

64402441216 is an equidigital number, since it uses as much as digits as its factorization.

64402441216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 62893029 (or 62893011 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The spelling of 64402441216 in words is "sixty-four billion, four hundred two million, four hundred forty-one thousand, two hundred sixteen".