835561078061 has 4 divisors (see below), whose sum is σ = 843833960124. Its totient is φ = 827288196000.

The previous prime is 835561078057. The next prime is 835561078069. The reversal of 835561078061 is 160870165538.

It is a happy number.

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 788311361161 + 47249716900 = 887869^2 + 217370^2 .

It is a cyclic number.

It is not a de Polignac number, because 835561078061 - 2² = 835561078057 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (835561078069) 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 in 3 ways as a sum of consecutive naturals, for example, 4136440880 + ... + 4136441081.

It is an arithmetic number, because the mean of its divisors is an integer number (210958490031).

Almost surely, 2^835561078061 is an apocalyptic number.

It is an amenable number.

835561078061 is a deficient number, since it is larger than the sum of its proper divisors (8272882063).

835561078061 is a wasteful number, since it uses less digits than its factorization.

835561078061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8272882062.

The product of its (nonzero) digits is 1209600, while the sum is 50.

The spelling of 835561078061 in words is "eight hundred thirty-five billion, five hundred sixty-one million, seventy-eight thousand, sixty-one".