216342633146 has 4 divisors (see below), whose sum is σ = 324513949722. Its totient is φ = 108171316572.

The previous prime is 216342633139. The next prime is 216342633173. The reversal of 216342633146 is 641336243612.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 184246119121 + 32096514025 = 429239^2 + 179155^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54085658285 + ... + 54085658288.

Almost surely, 2^216342633146 is an apocalyptic number.

216342633146 is a deficient number, since it is larger than the sum of its proper divisors (108171316576).

216342633146 is a wasteful number, since it uses less digits than its factorization.

216342633146 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108171316575.

The product of its digits is 373248, while the sum is 41.

Adding to 216342633146 its reverse (641336243612), we get a palindrome (857678876758).

The spelling of 216342633146 in words is "two hundred sixteen billion, three hundred forty-two million, six hundred thirty-three thousand, one hundred forty-six".