1659436052481 has 9 divisors (see below), whose sum is σ = 2396968769091. Its totient is φ = 1106288125272.

The previous prime is 1659436052479. The next prime is 1659436052509. The reversal of 1659436052481 is 1842506349561.

The square root of 1659436052481 is 1288191.

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

1659436052481 is a `hidden beast` number, since 1 + 6 + 5 + 9 + 4 + 3 + 605 + 24 + 8 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1633552391025 + 25883661456 = 1278105^2 + 160884^2 .

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 1659436052481 - 2¹ = 1659436052479 is a prime.

It is a super-2 number, since 2×1659436052481² (a number of 25 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1659436054481) 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, 3649875 + ... + 4079271.

Almost surely, 2^{1659436052481} is an apocalyptic number.

1659436052481 is the 1288191-st square number.

1659436052481 is the 644096-th centered octagonal number.

It is an amenable number.

1659436052481 is a deficient number, since it is larger than the sum of its proper divisors (737532716610).

1659436052481 is an frugal number, since it uses more digits than its factorization.

1659436052481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 858800 (or 429400 counting only the distinct ones).

The product of its (nonzero) digits is 6220800, while the sum is 54.

The spelling of 1659436052481 in words is "one trillion, six hundred fifty-nine billion, four hundred thirty-six million, fifty-two thousand, four hundred eighty-one".