65421330510 has 32 divisors (see below), whose sum is σ = 157350343680. Its totient is φ = 17408004768.

The previous prime is 65421330493. The next prime is 65421330517. The reversal of 65421330510 is 1503312456.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65421330517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2341090 + ... + 2368869.

It is an arithmetic number, because the mean of its divisors is an integer number (4917198240).

Almost surely, 2^65421330510 is an apocalyptic number.

65421330510 is an abundant number, since it is smaller than the sum of its proper divisors (91929013170).

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

65421330510 is a wasteful number, since it uses less digits than its factorization.

65421330510 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4710432.

The product of its (nonzero) digits is 10800, while the sum is 30.

Adding to 65421330510 its reverse (1503312456), we get a palindrome (66924642966).

The spelling of 65421330510 in words is "sixty-five billion, four hundred twenty-one million, three hundred thirty thousand, five hundred ten".