779640189101 has 2 divisors, whose sum is σ = 779640189102. Its totient is φ = 779640189100.

The previous prime is 779640189037. The next prime is 779640189161. The reversal of 779640189101 is 101981046977.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 772368534025 + 7271655076 = 878845^2 + 85274^2 .

It is an emirp because it is prime and its reverse (101981046977) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 779640189101 - 2⁶ = 779640189037 is a prime.

It is a super-2 number, since 2×779640189101² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (779640189161) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 389820094550 + 389820094551.

It is an arithmetic number, because the mean of its divisors is an integer number (389820094551).

Almost surely, 2^779640189101 is an apocalyptic number.

It is an amenable number.

779640189101 is a deficient number, since it is larger than the sum of its proper divisors (1).

779640189101 is an equidigital number, since it uses as much as digits as its factorization.

779640189101 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 53.

The spelling of 779640189101 in words is "seven hundred seventy-nine billion, six hundred forty million, one hundred eighty-nine thousand, one hundred one".