2144445091968 has 64 divisors (see below), whose sum is σ = 5879930123520. Its totient is φ = 691756477440.

The previous prime is 2144445091951. The next prime is 2144445091979. The reversal of 2144445091968 is 8691905444412.

It is a tau number, because it is divible by the number of its divisors (64).

It is a super-2 number, since 2×2144445091968² (a number of 25 digits) contains 22 as substring.

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, 90060555 + ... + 90084362.

It is an arithmetic number, because the mean of its divisors is an integer number (91873908180).

Almost surely, 2^{2144445091968} is an apocalyptic number.

It is an amenable number.

2144445091968 is an abundant number, since it is smaller than the sum of its proper divisors (3735485031552).

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

2144445091968 is a wasteful number, since it uses less digits than its factorization.

2144445091968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 180144965 (or 180144953 counting only the distinct ones).

The product of its (nonzero) digits is 9953280, while the sum is 57.

The spelling of 2144445091968 in words is "two trillion, one hundred forty-four billion, four hundred forty-five million, ninety-one thousand, nine hundred sixty-eight".