65121275232 has 144 divisors (see below), whose sum is σ = 200212871040. Its totient is φ = 19959054336.

The previous prime is 65121275227. The next prime is 65121275251. The reversal of 65121275232 is 23257212156.

65121275232 is a `hidden beast` number, since 6 + 5 + 1 + 2 + 127 + 523 + 2 = 666.

65121275232 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 928369 + ... + 996047.

It is an arithmetic number, because the mean of its divisors is an integer number (1390367160).

Almost surely, 2^65121275232 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 65121275232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100106435520).

65121275232 is an abundant number, since it is smaller than the sum of its proper divisors (135091595808).

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

65121275232 is a wasteful number, since it uses less digits than its factorization.

65121275232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67965 (or 67954 counting only the distinct ones).

The product of its digits is 50400, while the sum is 36.

Adding to 65121275232 its reverse (23257212156), we get a palindrome (88378487388).

The spelling of 65121275232 in words is "sixty-five billion, one hundred twenty-one million, two hundred seventy-five thousand, two hundred thirty-two".