220816257423661 has 16 divisors (see below), whose sum is σ = 230846164456320. Its totient is φ = 210822353280000.

The previous prime is 220816257423653. The next prime is 220816257423677. The reversal of 220816257423661 is 166324752618022.

It is a cyclic number.

It is not a de Polignac number, because 220816257423661 - 2³ = 220816257423653 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 (220816257423061) 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, 38476161 + ... + 43841161.

It is an arithmetic number, because the mean of its divisors is an integer number (14427885278520).

Almost surely, 2^{220816257423661} is an apocalyptic number.

It is an amenable number.

220816257423661 is a deficient number, since it is larger than the sum of its proper divisors (10029907032659).

220816257423661 is a wasteful number, since it uses less digits than its factorization.

220816257423661 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5368356.

The product of its (nonzero) digits is 11612160, while the sum is 55.

The spelling of 220816257423661 in words is "two hundred twenty trillion, eight hundred sixteen billion, two hundred fifty-seven million, four hundred twenty-three thousand, six hundred sixty-one".