8361278631 has 6 divisors (see below), whose sum is σ = 12077402480. Its totient is φ = 5574185748.

The previous prime is 8361278621. The next prime is 8361278659. The reversal of 8361278631 is 1368721638.

8361278631 is a `hidden beast` number, since 8 + 3 + 6 + 1 + 2 + 7 + 8 + 631 = 666.

It is not a de Polignac number, because 8361278631 - 2⁷ = 8361278503 is a prime.

It is a super-2 number, since 2×8361278631² (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 (8361278621) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 464515471 + ... + 464515488.

Almost surely, 2^8361278631 is an apocalyptic number.

8361278631 is a deficient number, since it is larger than the sum of its proper divisors (3716123849).

8361278631 is a wasteful number, since it uses less digits than its factorization.

8361278631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929030965 (or 929030962 counting only the distinct ones).

The product of its digits is 290304, while the sum is 45.

The square root of 8361278631 is about 91440.0275098384. The cubic root of 8361278631 is about 2029.6643892591.

The spelling of 8361278631 in words is "eight billion, three hundred sixty-one million, two hundred seventy-eight thousand, six hundred thirty-one".