216116661510 has 96 divisors (see below), whose sum is σ = 581861359872. Its totient is φ = 55595877120.

The previous prime is 216116661503. The next prime is 216116661577. The reversal of 216116661510 is 15166611612.

It is a super-2 number, since 2×216116661510² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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, 762252 + ... + 1006608.

It is an arithmetic number, because the mean of its divisors is an integer number (6061055832).

Almost surely, 2^216116661510 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216116661510, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (290930679936).

216116661510 is an abundant number, since it is smaller than the sum of its proper divisors (365744698362).

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

216116661510 is a wasteful number, since it uses less digits than its factorization.

216116661510 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244718 (or 244715 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 216116661510 in words is "two hundred sixteen billion, one hundred sixteen million, six hundred sixty-one thousand, five hundred ten".