64446455464446 has 32 divisors (see below), whose sum is σ = 146723946041088. Its totient is φ = 18680132018240.

The previous prime is 64446455464441. The next prime is 64446455464451.

64446455464446 is nontrivially palindromic in base 10.

It is an interprime number because it is at equal distance from previous prime (64446455464441) and next prime (64446455464451).

It is a Harshad number since it is a multiple of its sum of digits (66).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64446455464441) 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, 21227421231 + ... + 21227424266.

It is an arithmetic number, because the mean of its divisors is an integer number (4585123313784).

Almost surely, 2^{64446455464446} is an apocalyptic number.

64446455464446 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

64446455464446 is an abundant number, since it is smaller than the sum of its proper divisors (82277490576642).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64446455464446 is a wasteful number, since it uses less digits than its factorization.

64446455464446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42454845536.

The product of its digits is 2123366400, while the sum is 66.

The spelling of 64446455464446 in words is "sixty-four trillion, four hundred forty-six billion, four hundred fifty-five million, four hundred sixty-four thousand, four hundred forty-six".