2144445091978 has 96 divisors (see below), whose sum is σ = 3862838453760. Its totient is φ = 874462417920.

The previous prime is 2144445091951. The next prime is 2144445091979. The reversal of 2144445091978 is 8791905444412.

It is a Harshad number since it is a multiple of its sum of digits (58).

It is not an unprimeable number, because it can be changed into a prime (2144445091979) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 570177618 + ... + 570181378.

It is an arithmetic number, because the mean of its divisors is an integer number (40237900560).

Almost surely, 2^{2144445091978} is an apocalyptic number.

2144445091978 is a deficient number, since it is larger than the sum of its proper divisors (1718393361782).

2144445091978 is a wasteful number, since it uses less digits than its factorization.

2144445091978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4520 (or 4491 counting only the distinct ones).

The product of its (nonzero) digits is 11612160, while the sum is 58.

The spelling of 2144445091978 in words is "two trillion, one hundred forty-four billion, four hundred forty-five million, ninety-one thousand, nine hundred seventy-eight".