65261532672 has 480 divisors, whose sum is σ = 220614451200. Its totient is φ = 18189287424.

The previous prime is 65261532667. The next prime is 65261532683. The reversal of 65261532672 is 27623516256.

65261532672 is a `hidden beast` number, since 6 + 5 + 2 + 615 + 3 + 26 + 7 + 2 = 666.

65261532672 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 364589479 + ... + 364589657.

It is an arithmetic number, because the mean of its divisors is an integer number (459613440).

Almost surely, 2^65261532672 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 65261532672, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110307225600).

65261532672 is an abundant number, since it is smaller than the sum of its proper divisors (155352918528).

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

65261532672 is a wasteful number, since it uses less digits than its factorization.

65261532672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426 (or 407 counting only the distinct ones).

The product of its digits is 907200, while the sum is 45.

The spelling of 65261532672 in words is "sixty-five billion, two hundred sixty-one million, five hundred thirty-two thousand, six hundred seventy-two".