216711687910620 has 144 divisors (see below), whose sum is σ = 728630633945088. Its totient is φ = 47936225877120.

The previous prime is 216711687910567. The next prime is 216711687910639. The reversal of 216711687910620 is 26019786117612.

216711687910620 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×216711687910620² (a number of 29 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, 1188803352 + ... + 1188985631.

It is an arithmetic number, because the mean of its divisors is an integer number (5059934957952).

Almost surely, 2^{216711687910620} is an apocalyptic number.

216711687910620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

216711687910620 is an abundant number, since it is smaller than the sum of its proper divisors (511918946034468).

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

216711687910620 is a wasteful number, since it uses less digits than its factorization.

216711687910620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2377789040 (or 2377789031 counting only the distinct ones).

The product of its (nonzero) digits is 3048192, while the sum is 57.

The spelling of 216711687910620 in words is "two hundred sixteen trillion, seven hundred eleven billion, six hundred eighty-seven million, nine hundred ten thousand, six hundred twenty".