65525197952 has 64 divisors (see below), whose sum is σ = 135955506240. Its totient is φ = 31427988480.

The previous prime is 65525197949. The next prime is 65525197967. The reversal of 65525197952 is 25979152556.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (64).

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, 238823 + ... + 433689.

It is an arithmetic number, because the mean of its divisors is an integer number (2124304785).

Almost surely, 2^65525197952 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 65525197952, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67977753120).

65525197952 is an abundant number, since it is smaller than the sum of its proper divisors (70430308288).

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

65525197952 is a wasteful number, since it uses less digits than its factorization.

65525197952 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194989 (or 194977 counting only the distinct ones).

The product of its digits is 8505000, while the sum is 56.

The spelling of 65525197952 in words is "sixty-five billion, five hundred twenty-five million, one hundred ninety-seven thousand, nine hundred fifty-two".