2180988077 has 8 divisors (see below), whose sum is σ = 2227012536. Its totient is φ = 2135400192.

The previous prime is 2180988059. The next prime is 2180988091. The reversal of 2180988077 is 7708890812.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 858138436 + 1322849641 = 29294^2 + 36371^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2180988077 - 2⁶ = 2180988013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2180988037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 99038 + ... + 119039.

It is an arithmetic number, because the mean of its divisors is an integer number (278376567).

Almost surely, 2^2180988077 is an apocalyptic number.

It is an amenable number.

2180988077 is a deficient number, since it is larger than the sum of its proper divisors (46024459).

2180988077 is a wasteful number, since it uses less digits than its factorization.

2180988077 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218287.

The product of its (nonzero) digits is 451584, while the sum is 50.

The square root of 2180988077 is about 46701.0500631410. The cubic root of 2180988077 is about 1296.8341262287.

The spelling of 2180988077 in words is "two billion, one hundred eighty million, nine hundred eighty-eight thousand, seventy-seven".