65145632 has 48 divisors (see below), whose sum is σ = 140216832. Its totient is φ = 29660160.

The previous prime is 65145611. The next prime is 65145671. The reversal of 65145632 is 23654156.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14933 + ... + 18795.

It is an arithmetic number, because the mean of its divisors is an integer number (2921184).

Almost surely, 2^65145632 is an apocalyptic number.

65145632 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65145632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70108416).

65145632 is an abundant number, since it is smaller than the sum of its proper divisors (75071200).

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

65145632 is a wasteful number, since it uses less digits than its factorization.

65145632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3921 (or 3913 counting only the distinct ones).

The product of its digits is 21600, while the sum is 32.

The square root of 65145632 is about 8071.2844083206. The cubic root of 65145632 is about 402.3726320503.

Adding to 65145632 its reverse (23654156), we get a palindrome (88799788).

The spelling of 65145632 in words is "sixty-five million, one hundred forty-five thousand, six hundred thirty-two".