65139484544777 has 2 divisors, whose sum is σ = 65139484544778. Its totient is φ = 65139484544776.

The previous prime is 65139484544663. The next prime is 65139484544791. The reversal of 65139484544777 is 77744548493156.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 58318591228921 + 6820893315856 = 7636661^2 + 2611684^2 .

It is a cyclic number.

It is not a de Polignac number, because 65139484544777 - 2⁴⁰ = 64039972917001 is a prime.

It is not a weakly prime, because it can be changed into another prime (65139484544077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32569742272388 + 32569742272389.

It is an arithmetic number, because the mean of its divisors is an integer number (32569742272389).

Almost surely, 2^{65139484544777} is an apocalyptic number.

It is an amenable number.

65139484544777 is a deficient number, since it is larger than the sum of its proper divisors (1).

65139484544777 is an equidigital number, since it uses as much as digits as its factorization.

65139484544777 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2844979200, while the sum is 74.

The spelling of 65139484544777 in words is "sixty-five trillion, one hundred thirty-nine billion, four hundred eighty-four million, five hundred forty-four thousand, seven hundred seventy-seven".