217319474315680 has 48 divisors (see below), whose sum is σ = 560091554263584. Its totient is φ = 79025263386880.

The previous prime is 217319474315641. The next prime is 217319474315717. The reversal of 217319474315680 is 86513474913712.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61738485262 + ... + 61738488781.

It is an arithmetic number, because the mean of its divisors is an integer number (11668574047158).

It is a 1-persistent number, because it is pandigital, but 2⋅217319474315680 = 434638948631360 is not.

Almost surely, 2^{217319474315680} is an apocalyptic number.

217319474315680 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

217319474315680 is an abundant number, since it is smaller than the sum of its proper divisors (342772079947904).

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

217319474315680 is a wasteful number, since it uses less digits than its factorization.

217319474315680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 123476974069 (or 123476974061 counting only the distinct ones).

The product of its (nonzero) digits is 30481920, while the sum is 61.

The spelling of 217319474315680 in words is "two hundred seventeen trillion, three hundred nineteen billion, four hundred seventy-four million, three hundred fifteen thousand, six hundred eighty".