216525526461 has 16 divisors (see below), whose sum is σ = 320849256000. Its totient is φ = 144318536784.

The previous prime is 216525526433. The next prime is 216525526541. The reversal of 216525526461 is 164625525612.

216525526461 is a `hidden beast` number, since 2 + 1 + 6 + 52 + 552 + 6 + 46 + 1 = 666.

It is not a de Polignac number, because 216525526461 - 2¹⁵ = 216525493693 is a prime.

It is a super-2 number, since 2×216525526461² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216525526661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 758631 + ... + 1004276.

It is an arithmetic number, because the mean of its divisors is an integer number (20053078500).

Almost surely, 2^216525526461 is an apocalyptic number.

It is an amenable number.

216525526461 is a deficient number, since it is larger than the sum of its proper divisors (104323729539).

216525526461 is a wasteful number, since it uses less digits than its factorization.

216525526461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1767465 (or 1767459 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The spelling of 216525526461 in words is "two hundred sixteen billion, five hundred twenty-five million, five hundred twenty-six thousand, four hundred sixty-one".