2144954221477 has 4 divisors (see below), whose sum is σ = 2144964718060. Its totient is φ = 2144943724896.

The previous prime is 2144954221453. The next prime is 2144954221483. The reversal of 2144954221477 is 7741224594412.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 276459330436 + 1868494891041 = 525794^2 + 1366929^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2144954221477 is a prime.

It is a super-2 number, since 2×2144954221477² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2144954221447) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4935558 + ... + 5352535.

It is an arithmetic number, because the mean of its divisors is an integer number (536241179515).

Almost surely, 2^{2144954221477} is an apocalyptic number.

It is an amenable number.

2144954221477 is a deficient number, since it is larger than the sum of its proper divisors (10496583).

2144954221477 is a wasteful number, since it uses less digits than its factorization.

2144954221477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10496582.

The product of its digits is 4515840, while the sum is 52.

The spelling of 2144954221477 in words is "two trillion, one hundred forty-four billion, nine hundred fifty-four million, two hundred twenty-one thousand, four hundred seventy-seven".