216615641362 has 4 divisors (see below), whose sum is σ = 324923462046. Its totient is φ = 108307820680.

The previous prime is 216615641353. The next prime is 216615641381. The reversal of 216615641362 is 263146516612.

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., 151273545721 + 65342095641 = 388939^2 + 255621^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 54153910339 + ... + 54153910342.

Almost surely, 2^216615641362 is an apocalyptic number.

216615641362 is a deficient number, since it is larger than the sum of its proper divisors (108307820684).

216615641362 is a wasteful number, since it uses less digits than its factorization.

216615641362 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 108307820683.

The product of its digits is 311040, while the sum is 43.

The spelling of 216615641362 in words is "two hundred sixteen billion, six hundred fifteen million, six hundred forty-one thousand, three hundred sixty-two".