65491427232 has 768 divisors, whose sum is σ = 255699763200. Its totient is φ = 15785902080.

The previous prime is 65491427189. The next prime is 65491427329. The reversal of 65491427232 is 23272419456.

65491427232 is a `hidden beast` number, since 6 + 549 + 1 + 4 + 2 + 72 + 32 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 89346738 + ... + 89347470.

It is an arithmetic number, because the mean of its divisors is an integer number (332942400).

Almost surely, 2^65491427232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65491427232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (127849881600).

65491427232 is an abundant number, since it is smaller than the sum of its proper divisors (190208335968).

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

65491427232 is a wasteful number, since it uses less digits than its factorization.

65491427232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 866 (or 852 counting only the distinct ones).

The product of its digits is 725760, while the sum is 45.

The spelling of 65491427232 in words is "sixty-five billion, four hundred ninety-one million, four hundred twenty-seven thousand, two hundred thirty-two".