216611142660 has 144 divisors (see below), whose sum is σ = 716930061120. Its totient is φ = 52501236480.

The previous prime is 216611142617. The next prime is 216611142673. The reversal of 216611142660 is 66241116612.

216611142660 is a `hidden beast` number, since 2 + 1 + 6 + 611 + 14 + 26 + 6 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 15046746 + ... + 15061134.

It is an arithmetic number, because the mean of its divisors is an integer number (4978680980).

Almost surely, 2^216611142660 is an apocalyptic number.

216611142660 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216611142660 is an abundant number, since it is smaller than the sum of its proper divisors (500318918460).

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

216611142660 is a wasteful number, since it uses less digits than its factorization.

216611142660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22018 (or 22013 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The spelling of 216611142660 in words is "two hundred sixteen billion, six hundred eleven million, one hundred forty-two thousand, six hundred sixty".