216528213637625 has 32 divisors (see below), whose sum is σ = 270819952865280. Its totient is φ = 172842633163200.

The previous prime is 216528213637523. The next prime is 216528213637633. The reversal of 216528213637625 is 526736312825612.

It is not a de Polignac number, because 216528213637625 - 2⁸ = 216528213637369 is a prime.

It is a super-2 number, since 2×216528213637625² (a number of 29 digits) contains 22 as substring.

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, 2801863736 + ... + 2801941014.

It is an arithmetic number, because the mean of its divisors is an integer number (8463123527040).

Almost surely, 2^{216528213637625} is an apocalyptic number.

216528213637625 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

216528213637625 is a deficient number, since it is larger than the sum of its proper divisors (54291739227655).

216528213637625 is an equidigital number, since it uses as much as digits as its factorization.

216528213637625 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126170 (or 126160 counting only the distinct ones).

The product of its digits is 43545600, while the sum is 59.

The spelling of 216528213637625 in words is "two hundred sixteen trillion, five hundred twenty-eight billion, two hundred thirteen million, six hundred thirty-seven thousand, six hundred twenty-five".