2017218872077 has 4 divisors (see below), whose sum is σ = 2018377529116. Its totient is φ = 2016060215040.

The previous prime is 2017218872069. The next prime is 2017218872093. The reversal of 2017218872077 is 7702788127102.

It is a happy number.

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 873750084516 + 1143468787561 = 934746^2 + 1069331^2 .

It is a cyclic number.

It is not a de Polignac number, because 2017218872077 - 2³ = 2017218872069 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 (2017218872047) 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, 579325908 + ... + 579329389.

It is an arithmetic number, because the mean of its divisors is an integer number (504594382279).

Almost surely, 2^{2017218872077} is an apocalyptic number.

It is an amenable number.

2017218872077 is a deficient number, since it is larger than the sum of its proper divisors (1158657039).

2017218872077 is a wasteful number, since it uses less digits than its factorization.

2017218872077 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1158657038.

The product of its (nonzero) digits is 1229312, while the sum is 52.

The spelling of 2017218872077 in words is "two trillion, seventeen billion, two hundred eighteen million, eight hundred seventy-two thousand, seventy-seven".