869820207061 has 8 divisors (see below), whose sum is σ = 991831186584. Its totient is φ = 755680903680.

The previous prime is 869820207031. The next prime is 869820207083. The reversal of 869820207061 is 160702028968.

869820207061 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 19624900 + 869800582161 = 4430^2 + 932631^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-869820207061 is a prime.

It is a super-2 number, since 2×869820207061² (a number of 25 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 = 869820206996 and 869820207014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (869820207031) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1967918800 + ... + 1967919241.

It is an arithmetic number, because the mean of its divisors is an integer number (123978898323).

Almost surely, 2^869820207061 is an apocalyptic number.

It is an amenable number.

869820207061 is a deficient number, since it is larger than the sum of its proper divisors (122010979523).

869820207061 is a wasteful number, since it uses less digits than its factorization.

869820207061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3935838071.

The product of its (nonzero) digits is 580608, while the sum is 49.

The spelling of 869820207061 in words is "eight hundred sixty-nine billion, eight hundred twenty million, two hundred seven thousand, sixty-one".