2177772240444 has 12 divisors (see below), whose sum is σ = 5081468561064. Its totient is φ = 725924080144.

The previous prime is 2177772240439. The next prime is 2177772240461. The reversal of 2177772240444 is 4440422777712.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 90740510007 + ... + 90740510030.

It is an arithmetic number, because the mean of its divisors is an integer number (423455713422).

Almost surely, 2^{2177772240444} is an apocalyptic number.

It is an amenable number.

2177772240444 is an abundant number, since it is smaller than the sum of its proper divisors (2903696320620).

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

2177772240444 is a wasteful number, since it uses less digits than its factorization.

2177772240444 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 181481020044 (or 181481020042 counting only the distinct ones).

The product of its (nonzero) digits is 4917248, while the sum is 51.

The spelling of 2177772240444 in words is "two trillion, one hundred seventy-seven billion, seven hundred seventy-two million, two hundred forty thousand, four hundred forty-four".