217028402877 has 48 divisors (see below), whose sum is σ = 341939441088. Its totient is φ = 121375088640.

The previous prime is 217028402849. The next prime is 217028402881. The reversal of 217028402877 is 778204820712.

It is not a de Polignac number, because 217028402877 - 2⁷ = 217028402749 is a prime.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (217028400877) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 29738493 + ... + 29745789.

It is an arithmetic number, because the mean of its divisors is an integer number (7123738356).

Almost surely, 2^217028402877 is an apocalyptic number.

It is an amenable number.

217028402877 is a deficient number, since it is larger than the sum of its proper divisors (124911038211).

217028402877 is a wasteful number, since it uses less digits than its factorization.

217028402877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12670 (or 12657 counting only the distinct ones).

The product of its (nonzero) digits is 702464, while the sum is 48.

The spelling of 217028402877 in words is "two hundred seventeen billion, twenty-eight million, four hundred two thousand, eight hundred seventy-seven".