216582436542 has 64 divisors (see below), whose sum is σ = 471629874240. Its totient is φ = 66028363776.

The previous prime is 216582436537. The next prime is 216582436591. The reversal of 216582436542 is 245634285612.

It is a junction number, because it is equal to n+sod(n) for n = 216582436491 and 216582436500.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 3017698 + ... + 3088634.

It is an arithmetic number, because the mean of its divisors is an integer number (7369216785).

Almost surely, 2^216582436542 is an apocalyptic number.

216582436542 is an abundant number, since it is smaller than the sum of its proper divisors (255047437698).

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

216582436542 is a wasteful number, since it uses less digits than its factorization.

216582436542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71805.

The product of its digits is 2764800, while the sum is 48.

The spelling of 216582436542 in words is "two hundred sixteen billion, five hundred eighty-two million, four hundred thirty-six thousand, five hundred forty-two".