216626842877 has 6 divisors (see below), whose sum is σ = 228628330398. Its totient is φ = 205225429752.

The previous prime is 216626842843. The next prime is 216626842907. The reversal of 216626842877 is 778248626612.

It can be written as a sum of positive squares in only one way, i.e., 179296352356 + 37330490521 = 423434^2 + 193211^2 .

It is not a de Polignac number, because 216626842877 - 2¹⁰ = 216626841853 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 (216626842477) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 300036818 + ... + 300037539.

It is an arithmetic number, because the mean of its divisors is an integer number (38104721733).

Almost surely, 2^216626842877 is an apocalyptic number.

It is an amenable number.

216626842877 is a deficient number, since it is larger than the sum of its proper divisors (12001487521).

216626842877 is an equidigital number, since it uses as much as digits as its factorization.

216626842877 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600074395 (or 600074376 counting only the distinct ones).

The product of its digits is 21676032, while the sum is 59.

The spelling of 216626842877 in words is "two hundred sixteen billion, six hundred twenty-six million, eight hundred forty-two thousand, eight hundred seventy-seven".