236105612649 has 9 divisors (see below), whose sum is σ = 341043546103. Its totient is φ = 157402769952.

The previous prime is 236105612641. The next prime is 236105612671. The reversal of 236105612649 is 946216501632.

The square root of 236105612649 is 485907.

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

236105612649 is a `hidden beast` number, since 2 + 3 + 61 + 0 + 561 + 26 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 38222987049 + 197882625600 = 195507^2 + 444840^2 .

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

It is not a de Polignac number, because 236105612649 - 2³ = 236105612641 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (236105612641) 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, 1376737 + ... + 1538705.

Almost surely, 2^236105612649 is an apocalyptic number.

236105612649 is the 485907-th square number.

236105612649 is the 242954-th centered octagonal number.

It is an amenable number.

236105612649 is a deficient number, since it is larger than the sum of its proper divisors (104937933454).

236105612649 is an frugal number, since it uses more digits than its factorization.

236105612649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323944 (or 161972 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 236105612649 in words is "two hundred thirty-six billion, one hundred five million, six hundred twelve thousand, six hundred forty-nine".