265535940650077 has 2 divisors, whose sum is σ = 265535940650078. Its totient is φ = 265535940650076.

The previous prime is 265535940650033. The next prime is 265535940650081. The reversal of 265535940650077 is 770056049535562.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 263976024580921 + 1559916069156 = 16247339^2 + 1248966^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-265535940650077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (265535940650177) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 132767970325038 + 132767970325039.

It is an arithmetic number, because the mean of its divisors is an integer number (132767970325039).

Almost surely, 2^{265535940650077} is an apocalyptic number.

It is an amenable number.

265535940650077 is a deficient number, since it is larger than the sum of its proper divisors (1).

265535940650077 is an equidigital number, since it uses as much as digits as its factorization.

265535940650077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 238140000, while the sum is 64.

The spelling of 265535940650077 in words is "two hundred sixty-five trillion, five hundred thirty-five billion, nine hundred forty million, six hundred fifty thousand, seventy-seven".