77703432017201 has 2 divisors, whose sum is σ = 77703432017202. Its totient is φ = 77703432017200.

The previous prime is 77703432017191. The next prime is 77703432017291. The reversal of 77703432017201 is 10271023430777.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64963358200225 + 12740073816976 = 8059985^2 + 3569324^2 .

It is a cyclic number.

It is not a de Polignac number, because 77703432017201 - 2¹⁸ = 77703431755057 is a prime.

It is not a weakly prime, because it can be changed into another prime (77703432017291) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38851716008600 + 38851716008601.

It is an arithmetic number, because the mean of its divisors is an integer number (38851716008601).

Almost surely, 2^{77703432017201} is an apocalyptic number.

It is an amenable number.

77703432017201 is a deficient number, since it is larger than the sum of its proper divisors (1).

77703432017201 is an equidigital number, since it uses as much as digits as its factorization.

77703432017201 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 345744, while the sum is 44.

Adding to 77703432017201 its reverse (10271023430777), we get a palindrome (87974455447978).

The spelling of 77703432017201 in words is "seventy-seven trillion, seven hundred three billion, four hundred thirty-two million, seventeen thousand, two hundred one".