8261069842 has 8 divisors (see below), whose sum is σ = 12407976396. Its totient is φ = 4125077712.

The previous prime is 8261069837. The next prime is 8261069849. The reversal of 8261069842 is 2489601628.

It can be written as a sum of positive squares in 2 ways, for example, as 7961814441 + 299255401 = 89229^2 + 17299^2 .

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

It is a super-5 number, since 5×8261069842⁵ (a number of 51 digits) contains 55555 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 8261069792 and 8261069801.

It is not an unprimeable number, because it can be changed into a prime (8261069849) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2726713 + ... + 2729740.

Almost surely, 2^8261069842 is an apocalyptic number.

8261069842 is a deficient number, since it is larger than the sum of its proper divisors (4146906554).

8261069842 is a wasteful number, since it uses less digits than its factorization.

8261069842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5457212.

The product of its (nonzero) digits is 331776, while the sum is 46.

The square root of 8261069842 is about 90890.4276698047. The cubic root of 8261069842 is about 2021.5233617163.

The spelling of 8261069842 in words is "eight billion, two hundred sixty-one million, sixty-nine thousand, eight hundred forty-two".