217766472044 has 12 divisors (see below), whose sum is σ = 415735992168. Its totient is φ = 98984760000.

The previous prime is 217766472019. The next prime is 217766472127. The reversal of 217766472044 is 440274667712.

It is a junction number, because it is equal to n+sod(n) for n = 217766471983 and 217766472001.

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, 2474618957 + ... + 2474619044.

It is an arithmetic number, because the mean of its divisors is an integer number (34644666014).

Almost surely, 2^217766472044 is an apocalyptic number.

It is an amenable number.

217766472044 is a deficient number, since it is larger than the sum of its proper divisors (197969520124).

217766472044 is a wasteful number, since it uses less digits than its factorization.

217766472044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4949238016 (or 4949238014 counting only the distinct ones).

The product of its (nonzero) digits is 3161088, while the sum is 50.

The spelling of 217766472044 in words is "two hundred seventeen billion, seven hundred sixty-six million, four hundred seventy-two thousand, forty-four".