162428501681 has 2 divisors, whose sum is σ = 162428501682. Its totient is φ = 162428501680.

The previous prime is 162428501623. The next prime is 162428501701. The reversal of 162428501681 is 186105824261.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 141725896225 + 20702605456 = 376465^2 + 143884^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-162428501681 is a prime.

It is a super-2 number, since 2×162428501681² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (162428501621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 81214250840 + 81214250841.

It is an arithmetic number, because the mean of its divisors is an integer number (81214250841).

Almost surely, 2^162428501681 is an apocalyptic number.

It is an amenable number.

162428501681 is a deficient number, since it is larger than the sum of its proper divisors (1).

162428501681 is an equidigital number, since it uses as much as digits as its factorization.

162428501681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 184320, while the sum is 44.

The spelling of 162428501681 in words is "one hundred sixty-two billion, four hundred twenty-eight million, five hundred one thousand, six hundred eighty-one".