13444446888890 has 16 divisors (see below), whose sum is σ = 24200617629960. Its totient is φ = 5377642482240.

The previous prime is 13444446888877. The next prime is 13444446888913. The reversal of 13444446888890 is 9888864444431.

It is a Cunningham number, because it is equal to 3666667²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 10943174954209 + 2501271934681 = 3308047^2 + 1581541^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 16619321 + ... + 17409500.

Almost surely, 2^{13444446888890} is an apocalyptic number.

13444446888890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

13444446888890 is a deficient number, since it is larger than the sum of its proper divisors (10756170741070).

13444446888890 is a wasteful number, since it uses less digits than its factorization.

13444446888890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34068337.

The product of its (nonzero) digits is 679477248, while the sum is 71.

The spelling of 13444446888890 in words is "thirteen trillion, four hundred forty-four billion, four hundred forty-six million, eight hundred eighty-eight thousand, eight hundred ninety".