159264780821 has 2 divisors, whose sum is σ = 159264780822. Its totient is φ = 159264780820.

The previous prime is 159264780767. The next prime is 159264780839. The reversal of 159264780821 is 128087462951.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 124687378321 + 34577402500 = 353111^2 + 185950^2 .

It is a cyclic number.

It is not a de Polignac number, because 159264780821 - 2²⁶ = 159197671957 is a prime.

It is a super-2 number, since 2×159264780821² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (159264780881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79632390410 + 79632390411.

It is an arithmetic number, because the mean of its divisors is an integer number (79632390411).

Almost surely, 2^159264780821 is an apocalyptic number.

It is an amenable number.

159264780821 is a deficient number, since it is larger than the sum of its proper divisors (1).

159264780821 is an equidigital number, since it uses as much as digits as its factorization.

159264780821 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1935360, while the sum is 53.

The spelling of 159264780821 in words is "one hundred fifty-nine billion, two hundred sixty-four million, seven hundred eighty thousand, eight hundred twenty-one".