21616025636435 has 8 divisors (see below), whose sum is σ = 26326383462096. Its totient is φ = 17034718710240.

The previous prime is 21616025636407. The next prime is 21616025636519. The reversal of 21616025636435 is 53463652061612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21616025636435 - 2¹² = 21616025632339 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32262724496 + ... + 32262725165.

It is an arithmetic number, because the mean of its divisors is an integer number (3290797932762).

Almost surely, 2^{21616025636435} is an apocalyptic number.

21616025636435 is a deficient number, since it is larger than the sum of its proper divisors (4710357825661).

21616025636435 is an equidigital number, since it uses as much as digits as its factorization.

21616025636435 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64525449733.

The product of its (nonzero) digits is 4665600, while the sum is 50.

The spelling of 21616025636435 in words is "twenty-one trillion, six hundred sixteen billion, twenty-five million, six hundred thirty-six thousand, four hundred thirty-five".