10216603562661 has 20 divisors (see below), whose sum is σ = 15262075716844. Its totient is φ = 6810963796800.

The previous prime is 10216603562657. The next prime is 10216603562699. The reversal of 10216603562661 is 16626530661201.

10216603562661 is a `hidden beast` number, since 1 + 0 + 2 + 16 + 6 + 0 + 3 + 5 + 626 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 4756787172036 + 5459816390625 = 2181006^2 + 2336625^2 .

It is not a de Polignac number, because 10216603562661 - 2² = 10216603562657 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (10216603562611) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 4487721 + ... + 6369681.

Almost surely, 2^{10216603562661} is an apocalyptic number.

It is an amenable number.

10216603562661 is a deficient number, since it is larger than the sum of its proper divisors (5045472154183).

10216603562661 is an equidigital number, since it uses as much as digits as its factorization.

10216603562661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1948994 (or 1948985 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 10216603562661 in words is "ten trillion, two hundred sixteen billion, six hundred three million, five hundred sixty-two thousand, six hundred sixty-one".