780196204085 has 4 divisors (see below), whose sum is σ = 936235444908. Its totient is φ = 624156963264.

The previous prime is 780196204079. The next prime is 780196204157. The reversal of 780196204085 is 580402691087.

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 563425880689 + 216770323396 = 750617^2 + 465586^2 .

It is a cyclic number.

It is not a de Polignac number, because 780196204085 - 2²² = 780192009781 is a prime.

It is a super-2 number, since 2×780196204085² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 78019620404 + ... + 78019620413.

It is an arithmetic number, because the mean of its divisors is an integer number (234058861227).

Almost surely, 2^780196204085 is an apocalyptic number.

It is an amenable number.

780196204085 is a deficient number, since it is larger than the sum of its proper divisors (156039240823).

780196204085 is a wasteful number, since it uses less digits than its factorization.

780196204085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156039240822.

The product of its (nonzero) digits is 967680, while the sum is 50.

The spelling of 780196204085 in words is "seven hundred eighty billion, one hundred ninety-six million, two hundred four thousand, eighty-five".