216724566144 has 64 divisors (see below), whose sum is σ = 575746123680. Its totient is φ = 72232550400.

The previous prime is 216724566137. The next prime is 216724566167. The reversal of 216724566144 is 441665427612.

It is a tau number, because it is divible by the number of its divisors (64).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 216724566093 and 216724566102.

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, 3533499 + ... + 3594309.

Almost surely, 2^216724566144 is an apocalyptic number.

216724566144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

216724566144 is an abundant number, since it is smaller than the sum of its proper divisors (359021557536).

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

216724566144 is an equidigital number, since it uses as much as digits as its factorization.

216724566144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70109 (or 70097 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 48.

The spelling of 216724566144 in words is "two hundred sixteen billion, seven hundred twenty-four million, five hundred sixty-six thousand, one hundred forty-four".