216814953544 has 16 divisors (see below), whose sum is σ = 464603472000. Its totient is φ = 92920694352.

The previous prime is 216814953541. The next prime is 216814953571. The reversal of 216814953544 is 445359418612.

It is a junction number, because it is equal to n+sod(n) for n = 216814953491 and 216814953500.

It is not an unprimeable number, because it can be changed into a prime (216814953541) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1935847744 + ... + 1935847855.

It is an arithmetic number, because the mean of its divisors is an integer number (29037717000).

Almost surely, 2^216814953544 is an apocalyptic number.

It is an amenable number.

216814953544 is an abundant number, since it is smaller than the sum of its proper divisors (247788518456).

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

216814953544 is a wasteful number, since it uses less digits than its factorization.

216814953544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3871695612 (or 3871695608 counting only the distinct ones).

The product of its digits is 4147200, while the sum is 52.

The spelling of 216814953544 in words is "two hundred sixteen billion, eight hundred fourteen million, nine hundred fifty-three thousand, five hundred forty-four".