39466987569 has 9 divisors (see below), whose sum is σ = 57008731819. Its totient is φ = 26310927720.

The previous prime is 39466987519. The next prime is 39466987583. The reversal of 39466987569 is 96578966493.

The square root of 39466987569 is 198663.

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

39466987569 is a `hidden beast` number, since 3 + 9 + 466 + 98 + 75 + 6 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 31094737569 + 8372250000 = 176337^2 + 91500^2 .

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

It is not a de Polignac number, because 39466987569 - 2³⁵ = 5107249201 is a prime.

It is a super-2 number, since 2×39466987569² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 39466987497 and 39466987506.

It is not an unprimeable number, because it can be changed into a prime (39466987519) 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, 562879 + ... + 629099.

Almost surely, 2^39466987569 is an apocalyptic number.

39466987569 is the 198663-rd square number.

39466987569 is the 99332-nd centered octagonal number.

It is an amenable number.

39466987569 is a deficient number, since it is larger than the sum of its proper divisors (17541744250).

39466987569 is an frugal number, since it uses more digits than its factorization.

39466987569 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132448 (or 66224 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 72.

The spelling of 39466987569 in words is "thirty-nine billion, four hundred sixty-six million, nine hundred eighty-seven thousand, five hundred sixty-nine".