1648165548481 has 9 divisors (see below), whose sum is σ = 1651887986049. Its totient is φ = 1644451489044.

The previous prime is 1648165548473. The next prime is 1648165548521. The reversal of 1648165548481 is 1848455618461.

It is a happy number.

The square root of 1648165548481 is 1283809.

It is a perfect power (a square), and thus also a powerful number.

It is not a de Polignac number, because 1648165548481 - 2³ = 1648165548473 is a prime.

It is a super-2 number, since 2×1648165548481² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1648165542481) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 702242350 + ... + 702244696.

It is an arithmetic number, because the mean of its divisors is an integer number (183543109561).

Almost surely, 2^{1648165548481} is an apocalyptic number.

1648165548481 is the 1283809-th square number.

1648165548481 is the 641905-th centered octagonal number.

It is an amenable number.

1648165548481 is a deficient number, since it is larger than the sum of its proper divisors (3722437568).

1648165548481 is an frugal number, since it uses more digits than its factorization.

1648165548481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5788 (or 2894 counting only the distinct ones).

The product of its digits is 29491200, while the sum is 61.

The spelling of 1648165548481 in words is "one trillion, six hundred forty-eight billion, one hundred sixty-five million, five hundred forty-eight thousand, four hundred eighty-one".