65515112010 has 128 divisors (see below), whose sum is σ = 189834854400. Its totient is φ = 16017238080.

The previous prime is 65515111943. The next prime is 65515112021. The reversal of 65515112010 is 1021151556.

65515112010 is a `hidden beast` number, since 655 + 1 + 5 + 1 + 1 + 2 + 0 + 1 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 46954 + ... + 365013.

It is an arithmetic number, because the mean of its divisors is an integer number (1483084800).

Almost surely, 2^65515112010 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65515112010, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94917427200).

65515112010 is an abundant number, since it is smaller than the sum of its proper divisors (124319742390).

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

65515112010 is a wasteful number, since it uses less digits than its factorization.

65515112010 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 412033 (or 412027 counting only the distinct ones).

The product of its (nonzero) digits is 1500, while the sum is 27.

Adding to 65515112010 its reverse (1021151556), we get a palindrome (66536263566).

The spelling of 65515112010 in words is "sixty-five billion, five hundred fifteen million, one hundred twelve thousand, ten".