65506015049 has 4 divisors (see below), whose sum is σ = 66242037780. Its totient is φ = 64769992320.

The previous prime is 65506015033. The next prime is 65506015111. The reversal of 65506015049 is 94051060556.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 46669825024 + 18836190025 = 216032^2 + 137245^2 .

It is a cyclic number.

It is not a de Polignac number, because 65506015049 - 2⁴ = 65506015033 is a prime.

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 = 65506014997 and 65506015015.

It is not an unprimeable number, because it can be changed into a prime (65506015349) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 368011232 + ... + 368011409.

It is an arithmetic number, because the mean of its divisors is an integer number (16560509445).

Almost surely, 2^65506015049 is an apocalyptic number.

It is an amenable number.

65506015049 is a deficient number, since it is larger than the sum of its proper divisors (736022731).

65506015049 is an equidigital number, since it uses as much as digits as its factorization.

65506015049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736022730.

The product of its (nonzero) digits is 162000, while the sum is 41.

The spelling of 65506015049 in words is "sixty-five billion, five hundred six million, fifteen thousand, forty-nine".