152810161981 has 2 divisors, whose sum is σ = 152810161982. Its totient is φ = 152810161980.

The previous prime is 152810161963. The next prime is 152810162009. The reversal of 152810161981 is 189161018251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 127633993081 + 25176168900 = 357259^2 + 158670^2 .

It is a cyclic number.

It is not a de Polignac number, because 152810161981 - 2¹¹ = 152810159933 is a prime.

It is a super-2 number, since 2×152810161981² (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 (152810161181) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76405080990 + 76405080991.

It is an arithmetic number, because the mean of its divisors is an integer number (76405080991).

Almost surely, 2^152810161981 is an apocalyptic number.

It is an amenable number.

152810161981 is a deficient number, since it is larger than the sum of its proper divisors (1).

152810161981 is an equidigital number, since it uses as much as digits as its factorization.

152810161981 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 43.

The spelling of 152810161981 in words is "one hundred fifty-two billion, eight hundred ten million, one hundred sixty-one thousand, nine hundred eighty-one".