8278476861 has 8 divisors (see below), whose sum is σ = 11139235360. Its totient is φ = 5468351472.

The previous prime is 8278476827. The next prime is 8278476923. The reversal of 8278476861 is 1686748728.

It is a happy number.

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

It is not a de Polignac number, because 8278476861 - 2¹³ = 8278468669 is a prime.

It is a super-2 number, since 2×8278476861² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8278476061) 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, 12657895 + ... + 12658548.

It is an arithmetic number, because the mean of its divisors is an integer number (1392404420).

Almost surely, 2^8278476861 is an apocalyptic number.

It is an amenable number.

8278476861 is a deficient number, since it is larger than the sum of its proper divisors (2860758499).

8278476861 is a wasteful number, since it uses less digits than its factorization.

8278476861 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25316555.

The product of its digits is 7225344, while the sum is 57.

The square root of 8278476861 is about 90986.1355427298. The cubic root of 8278476861 is about 2022.9422259230.

The spelling of 8278476861 in words is "eight billion, two hundred seventy-eight million, four hundred seventy-six thousand, eight hundred sixty-one".