65421436410 has 192 divisors, whose sum is σ = 191452584960. Its totient is φ = 15359984640.

The previous prime is 65421436403. The next prime is 65421436441. The reversal of 65421436410 is 1463412456.

65421436410 is a `hidden beast` number, since 6 + 5 + 4 + 2 + 1 + 4 + 3 + 641 + 0 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 8164486 + ... + 8172494.

It is an arithmetic number, because the mean of its divisors is an integer number (997148880).

Almost surely, 2^65421436410 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65421436410, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95726292480).

65421436410 is an abundant number, since it is smaller than the sum of its proper divisors (126031148550).

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

65421436410 is a wasteful number, since it uses less digits than its factorization.

65421436410 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8293 (or 8290 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

Adding to 65421436410 its reverse (1463412456), we get a palindrome (66884848866).

The spelling of 65421436410 in words is "sixty-five billion, four hundred twenty-one million, four hundred thirty-six thousand, four hundred ten".