65536977449 has 2 divisors, whose sum is σ = 65536977450. Its totient is φ = 65536977448.

The previous prime is 65536977439. The next prime is 65536977487. The reversal of 65536977449 is 94477963556.

65536977449 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37189194025 + 28347783424 = 192845^2 + 168368^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-65536977449 is a prime.

It is not a weakly prime, because it can be changed into another prime (65536977409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32768488724 + 32768488725.

It is an arithmetic number, because the mean of its divisors is an integer number (32768488725).

Almost surely, 2^65536977449 is an apocalyptic number.

It is an amenable number.

65536977449 is a deficient number, since it is larger than the sum of its proper divisors (1).

65536977449 is an equidigital number, since it uses as much as digits as its factorization.

65536977449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 171460800, while the sum is 65.

The spelling of 65536977449 in words is "sixty-five billion, five hundred thirty-six million, nine hundred seventy-seven thousand, four hundred forty-nine".