8420631696 has 75 divisors (see below), whose sum is σ = 24381316201. Its totient is φ = 2805776064.

The previous prime is 8420631673. The next prime is 8420631697. The reversal of 8420631696 is 6961360248.

The square root of 8420631696 is 91764.

It is a perfect power (a square), and thus also a powerful number.

8420631696 is a `hidden beast` number, since 8 + 4 + 2 + 0 + 631 + 6 + 9 + 6 = 666.

It can be written as a sum of positive squares in only one way, i.e., 7785591696 + 635040000 = 88236^2 + 25200^2 .

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (8420631697) by changing a digit.

It is a polite number, since it can be written in 14 ways as a sum of consecutive naturals, for example, 3302230 + ... + 3304778.

Almost surely, 2^8420631696 is an apocalyptic number.

8420631696 is the 91764-th square number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8420631696

8420631696 is an abundant number, since it is smaller than the sum of its proper divisors (15960684505).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

8420631696 is an frugal number, since it uses more digits than its factorization.

8420631696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5118 (or 2554 counting only the distinct ones).

The product of its (nonzero) digits is 373248, while the sum is 45.

The cubic root of 8420631696 is about 2034.4556370849.

The spelling of 8420631696 in words is "eight billion, four hundred twenty million, six hundred thirty-one thousand, six hundred ninety-six".