216158287392 has 720 divisors, whose sum is σ = 736202507040. Its totient is φ = 61827784704.

The previous prime is 216158287379. The next prime is 216158287481. The reversal of 216158287392 is 293782851612.

216158287392 is a `hidden beast` number, since 21 + 6 + 1 + 582 + 8 + 7 + 39 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 704098503 + ... + 704098809.

It is an arithmetic number, because the mean of its divisors is an integer number (1022503482).

Almost surely, 2^216158287392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 216158287392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (368101253520).

216158287392 is an abundant number, since it is smaller than the sum of its proper divisors (520044219648).

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

216158287392 is a wasteful number, since it uses less digits than its factorization.

216158287392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 423 (or 377 counting only the distinct ones).

The product of its digits is 2903040, while the sum is 54.

The spelling of 216158287392 in words is "two hundred sixteen billion, one hundred fifty-eight million, two hundred eighty-seven thousand, three hundred ninety-two".