162456557481 has 9 divisors (see below), whose sum is σ = 234661218519. Its totient is φ = 108303565536.

The previous prime is 162456557327. The next prime is 162456557491. The reversal of 162456557481 is 184755654261.

The square root of 162456557481 is 403059.

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

162456557481 is a `hidden beast` number, since 1 + 6 + 2 + 4 + 5 + 6 + 557 + 4 + 81 = 666.

It can be written as a sum of positive squares in only one way, i.e., 8309234025 + 154147323456 = 91155^2 + 392616^2 .

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

It is not a de Polignac number, because 162456557481 - 2¹³ = 162456549289 is a prime.

It is a super-2 number, since 2×162456557481² (a number of 23 digits) contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (162456557491) 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, 1142001 + ... + 1276353.

Almost surely, 2^162456557481 is an apocalyptic number.

162456557481 is the 403059-th square number.

162456557481 is the 201530-th centered octagonal number.

It is an amenable number.

162456557481 is a deficient number, since it is larger than the sum of its proper divisors (72204661038).

162456557481 is an frugal number, since it uses more digits than its factorization.

162456557481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 268712 (or 134356 counting only the distinct ones).

The product of its digits is 8064000, while the sum is 54.

The spelling of 162456557481 in words is "one hundred sixty-two billion, four hundred fifty-six million, five hundred fifty-seven thousand, four hundred eighty-one".