64402620446 has 32 divisors (see below), whose sum is σ = 104271611040. Its totient is φ = 29719545856.

The previous prime is 64402620439. The next prime is 64402620449.

64402620446 is nontrivially palindromic in base 10.

64402620446 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64402620449) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3828065 + ... + 3844851.

It is an arithmetic number, because the mean of its divisors is an integer number (3258487845).

Almost surely, 2^64402620446 is an apocalyptic number.

64402620446 is a deficient number, since it is larger than the sum of its proper divisors (39868990594).

64402620446 is a wasteful number, since it uses less digits than its factorization.

64402620446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18988.

The product of its (nonzero) digits is 221184, while the sum is 38.

The spelling of 64402620446 in words is "sixty-four billion, four hundred two million, six hundred twenty thousand, four hundred forty-six".