163011041521 has 2 divisors, whose sum is σ = 163011041522. Its totient is φ = 163011041520.

The previous prime is 163011041467. The next prime is 163011041527. The reversal of 163011041521 is 125140110361.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 133710160896 + 29300880625 = 365664^2 + 171175^2 .

It is a cyclic number.

It is not a de Polignac number, because 163011041521 - 2¹⁵ = 163011008753 is a prime.

It is a super-2 number, since 2×163011041521² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (163011041527) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81505520760 + 81505520761.

It is an arithmetic number, because the mean of its divisors is an integer number (81505520761).

Almost surely, 2^163011041521 is an apocalyptic number.

It is an amenable number.

163011041521 is a deficient number, since it is larger than the sum of its proper divisors (1).

163011041521 is an equidigital number, since it uses as much as digits as its factorization.

163011041521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 720, while the sum is 25.

Adding to 163011041521 its reverse (125140110361), we get a palindrome (288151151882).

The spelling of 163011041521 in words is "one hundred sixty-three billion, eleven million, forty-one thousand, five hundred twenty-one".