65105211400 has 48 divisors (see below), whose sum is σ = 153285724800. Its totient is φ = 25712431680.

The previous prime is 65105211397. The next prime is 65105211401. The reversal of 65105211400 is 411250156.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is not an unprimeable number, because it can be changed into a prime (65105211401) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 2044492 + ... + 2076091.

It is an arithmetic number, because the mean of its divisors is an integer number (3193452600).

Almost surely, 2^65105211400 is an apocalyptic number.

It is an amenable number.

65105211400 is an abundant number, since it is smaller than the sum of its proper divisors (88180513400).

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

65105211400 is a wasteful number, since it uses less digits than its factorization.

65105211400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4120678 (or 4120669 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 25.

Adding to 65105211400 its reverse (411250156), we get a palindrome (65516461556).

The spelling of 65105211400 in words is "sixty-five billion, one hundred five million, two hundred eleven thousand, four hundred".