77980000201 has 4 divisors (see below), whose sum is σ = 80087567812. Its totient is φ = 75872432592.

The previous prime is 77980000171. The next prime is 77980000207. The reversal of 77980000201 is 10200008977.

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 52659234576 + 25320765625 = 229476^2 + 159125^2 .

It is a cyclic number.

It is not a de Polignac number, because 77980000201 - 2⁵ = 77980000169 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77980000207) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1053783750 + ... + 1053783823.

It is an arithmetic number, because the mean of its divisors is an integer number (20021891953).

Almost surely, 2^77980000201 is an apocalyptic number.

It is an amenable number.

77980000201 is a deficient number, since it is larger than the sum of its proper divisors (2107567611).

77980000201 is a wasteful number, since it uses less digits than its factorization.

77980000201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2107567610.

The product of its (nonzero) digits is 7056, while the sum is 34.

The spelling of 77980000201 in words is "seventy-seven billion, nine hundred eighty million, two hundred one", and thus it is an aban number.