220961653436159 has 4 divisors (see below), whose sum is σ = 220962549326904. Its totient is φ = 220960757545416.

The previous prime is 220961653436137. The next prime is 220961653436177. The reversal of 220961653436159 is 951634356169022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-220961653436159 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 (220961653436179) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 447575312 + ... + 448068725.

It is an arithmetic number, because the mean of its divisors is an integer number (55240637331726).

Almost surely, 2^{220961653436159} is an apocalyptic number.

220961653436159 is a deficient number, since it is larger than the sum of its proper divisors (895890745).

220961653436159 is an equidigital number, since it uses as much as digits as its factorization.

220961653436159 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 895890744.

The product of its (nonzero) digits is 62985600, while the sum is 62.

The spelling of 220961653436159 in words is "two hundred twenty trillion, nine hundred sixty-one billion, six hundred fifty-three million, four hundred thirty-six thousand, one hundred fifty-nine".