64444400444446 has 32 divisors (see below), whose sum is σ = 105577568373888. Its totient is φ = 29258718582240.

The previous prime is 64444400444363. The next prime is 64444400444453.

64444400444446 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×64444400444446² (a number of 28 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 64444400444393 and 64444400444402.

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, 1087768101 + ... + 1087827343.

It is an arithmetic number, because the mean of its divisors is an integer number (3299299011684).

Almost surely, 2^{64444400444446} is an apocalyptic number.

64444400444446 is a deficient number, since it is larger than the sum of its proper divisors (41133167929442).

64444400444446 is a wasteful number, since it uses less digits than its factorization.

64444400444446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 116136.

The product of its (nonzero) digits is 37748736, while the sum is 52.

It can be divided in two parts, 64444400 and 444446, that added together give a palindrome (64888846).

The spelling of 64444400444446 in words is "sixty-four trillion, four hundred forty-four billion, four hundred million, four hundred forty-four thousand, four hundred forty-six".