1485644020381 has 2 divisors, whose sum is σ = 1485644020382. Its totient is φ = 1485644020380.

The previous prime is 1485644020361. The next prime is 1485644020433. The reversal of 1485644020381 is 1830204465841.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1383281776900 + 102362243481 = 1176130^2 + 319941^2 .

It is a cyclic number.

It is not a de Polignac number, because 1485644020381 - 2⁵ = 1485644020349 is a prime.

It is a super-2 number, since 2×1485644020381² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1485644020361) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 742822010190 + 742822010191.

It is an arithmetic number, because the mean of its divisors is an integer number (742822010191).

Almost surely, 2^{1485644020381} is an apocalyptic number.

It is an amenable number.

1485644020381 is a deficient number, since it is larger than the sum of its proper divisors (1).

1485644020381 is an equidigital number, since it uses as much as digits as its factorization.

1485644020381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 737280, while the sum is 46.

The spelling of 1485644020381 in words is "one trillion, four hundred eighty-five billion, six hundred forty-four million, twenty thousand, three hundred eighty-one".