217076988378 has 16 divisors (see below), whose sum is σ = 434285538336. Its totient is φ = 72337069200.

The previous prime is 217076988377. The next prime is 217076988379. The reversal of 217076988378 is 873889670712.

It is an interprime number because it is at equal distance from previous prime (217076988377) and next prime (217076988379).

It is not an unprimeable number, because it can be changed into a prime (217076988371) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5460276 + ... + 5499887.

It is an arithmetic number, because the mean of its divisors is an integer number (27142846146).

Almost surely, 2^217076988378 is an apocalyptic number.

217076988378 is an abundant number, since it is smaller than the sum of its proper divisors (217208549958).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

217076988378 is a wasteful number, since it uses less digits than its factorization.

217076988378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10963469.

The product of its (nonzero) digits is 56899584, while the sum is 66.

The spelling of 217076988378 in words is "two hundred seventeen billion, seventy-six million, nine hundred eighty-eight thousand, three hundred seventy-eight".