216851864307562 has 32 divisors (see below), whose sum is σ = 355159889187264. Its totient is φ = 98482537670400.

The previous prime is 216851864307427. The next prime is 216851864307563. The reversal of 216851864307562 is 265703468158612.

216851864307562 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 216851864307494 and 216851864307503.

It is not an unprimeable number, because it can be changed into a prime (216851864307563) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1592358418 + ... + 1592494594.

It is an arithmetic number, because the mean of its divisors is an integer number (11098746537102).

Almost surely, 2^{216851864307562} is an apocalyptic number.

216851864307562 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

216851864307562 is a deficient number, since it is larger than the sum of its proper divisors (138308024879702).

216851864307562 is a wasteful number, since it uses less digits than its factorization.

216851864307562 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 199174.

The product of its (nonzero) digits is 116121600, while the sum is 64.

The spelling of 216851864307562 in words is "two hundred sixteen trillion, eight hundred fifty-one billion, eight hundred sixty-four million, three hundred seven thousand, five hundred sixty-two".