780826437940081 has 4 divisors (see below), whose sum is σ = 840890010089332. Its totient is φ = 720762865790832.

The previous prime is 780826437940061. The next prime is 780826437940091. The reversal of 780826437940081 is 180049734628087.

780826437940081 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 339953058849856 + 440873379090225 = 18437816^2 + 20996985^2 .

It is a cyclic number.

It is not a de Polignac number, because 780826437940081 - 2¹³ = 780826437931889 is a prime.

It is a super-2 number, since 2×780826437940081² (a number of 31 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 780826437939989 and 780826437940016.

It is not an unprimeable number, because it can be changed into a prime (780826437940061) 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, 30031786074606 + ... + 30031786074631.

It is an arithmetic number, because the mean of its divisors is an integer number (210222502522333).

Almost surely, 2^{780826437940081} is an apocalyptic number.

It is an amenable number.

780826437940081 is a deficient number, since it is larger than the sum of its proper divisors (60063572149251).

780826437940081 is a wasteful number, since it uses less digits than its factorization.

780826437940081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 60063572149250.

The product of its (nonzero) digits is 130056192, while the sum is 67.

The spelling of 780826437940081 in words is "seven hundred eighty trillion, eight hundred twenty-six billion, four hundred thirty-seven million, nine hundred forty thousand, eighty-one".