65631236804 has 36 divisors (see below), whose sum is σ = 133684766460. Its totient is φ = 28111184640.

The previous prime is 65631236791. The next prime is 65631236861. The reversal of 65631236804 is 40863213656.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 55450830400 + 10180406404 = 235480^2 + 100898^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 240032 + ... + 434600.

It is an arithmetic number, because the mean of its divisors is an integer number (3713465735).

Almost surely, 2^65631236804 is an apocalyptic number.

It is an amenable number.

65631236804 is an abundant number, since it is smaller than the sum of its proper divisors (68053529656).

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

65631236804 is a wasteful number, since it uses less digits than its factorization.

65631236804 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 196308 (or 196299 counting only the distinct ones).

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 65631236804 in words is "sixty-five billion, six hundred thirty-one million, two hundred thirty-six thousand, eight hundred four".