243474151761 has 9 divisors (see below), whose sum is σ = 351687024091. Its totient is φ = 162315114312.

The previous prime is 243474151727. The next prime is 243474151763. The reversal of 243474151761 is 167151474342.

The square root of 243474151761 is 493431.

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

243474151761 is a `hidden beast` number, since 2 + 4 + 3 + 4 + 74 + 1 + 517 + 61 = 666.

It can be written as a sum of positive squares in only one way, i.e., 1846850625 + 241627301136 = 42975^2 + 491556^2 .

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

It is not a de Polignac number, because 243474151761 - 2¹¹ = 243474149713 is a prime.

It is a super-2 number, since 2×243474151761² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (243474151763) 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, 1398055 + ... + 1562531.

Almost surely, 2^243474151761 is an apocalyptic number.

243474151761 is the 493431-st square number.

243474151761 is the 246716-th centered octagonal number.

It is an amenable number.

243474151761 is a deficient number, since it is larger than the sum of its proper divisors (108212872330).

243474151761 is an frugal number, since it uses more digits than its factorization.

243474151761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328960 (or 164480 counting only the distinct ones).

The product of its digits is 564480, while the sum is 45.

The spelling of 243474151761 in words is "two hundred forty-three billion, four hundred seventy-four million, one hundred fifty-one thousand, seven hundred sixty-one".