216601973480 has 32 divisors (see below), whose sum is σ = 490625289000. Its totient is φ = 86059305216.

The previous prime is 216601973437. The next prime is 216601973509. The reversal of 216601973480 is 84379106612.

It can be written as a sum of positive squares in 4 ways, for example, as 106222542724 + 110379430756 = 325918^2 + 332234^2 .

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, 18165347 + ... + 18177266.

Almost surely, 2^216601973480 is an apocalyptic number.

216601973480 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216601973480 is an abundant number, since it is smaller than the sum of its proper divisors (274023315520).

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

216601973480 is a wasteful number, since it uses less digits than its factorization.

216601973480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36342773 (or 36342769 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 47.

The spelling of 216601973480 in words is "two hundred sixteen billion, six hundred one million, nine hundred seventy-three thousand, four hundred eighty".