216441123641 has 2 divisors, whose sum is σ = 216441123642. Its totient is φ = 216441123640.

The previous prime is 216441123571. The next prime is 216441123671. The reversal of 216441123641 is 146321144612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 140910144400 + 75530979241 = 375380^2 + 274829^2 .

It is a cyclic number.

It is not a de Polignac number, because 216441123641 - 2¹⁴ = 216441107257 is a prime.

It is not a weakly prime, because it can be changed into another prime (216441123671) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108220561820 + 108220561821.

It is an arithmetic number, because the mean of its divisors is an integer number (108220561821).

Almost surely, 2^216441123641 is an apocalyptic number.

It is an amenable number.

216441123641 is a deficient number, since it is larger than the sum of its proper divisors (1).

216441123641 is an equidigital number, since it uses as much as digits as its factorization.

216441123641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 27648, while the sum is 35.

The spelling of 216441123641 in words is "two hundred sixteen billion, four hundred forty-one million, one hundred twenty-three thousand, six hundred forty-one".