987777722222222 has 8 divisors (see below), whose sum is σ = 1481666749655472. Its totient is φ = 493888805670400.

The previous prime is 987777722222197. The next prime is 987777722222261. The reversal of 987777722222222 is 222222227777789.

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

It is a nialpdrome in base 10.

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, 158222 + ... + 44447502.

It is an arithmetic number, because the mean of its divisors is an integer number (185208343706934).

Almost surely, 2^{987777722222222} is an apocalyptic number.

987777722222222 is a deficient number, since it is larger than the sum of its proper divisors (493889027433250).

987777722222222 is a wasteful number, since it uses less digits than its factorization.

987777722222222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55440714.

The product of its digits is 309786624, while the sum is 68.

The spelling of 987777722222222 in words is "nine hundred eighty-seven trillion, seven hundred seventy-seven billion, seven hundred twenty-two million, two hundred twenty-two thousand, two hundred twenty-two".