65100661817640 has 256 divisors, whose sum is σ = 202981600926720. Its totient is φ = 16690608506880.

The previous prime is 65100661817621. The next prime is 65100661817687. The reversal of 65100661817640 is 4671816600156.

It is a happy number.

65100661817640 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 456624847 + ... + 456767393.

It is an arithmetic number, because the mean of its divisors is an integer number (792896878620).

Almost surely, 2^{65100661817640} is an apocalyptic number.

65100661817640 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65100661817640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101490800463360).

65100661817640 is an abundant number, since it is smaller than the sum of its proper divisors (137880939109080).

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

65100661817640 is a wasteful number, since it uses less digits than its factorization.

65100661817640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 143992 (or 143988 counting only the distinct ones).

The product of its (nonzero) digits is 1451520, while the sum is 51.

The spelling of 65100661817640 in words is "sixty-five trillion, one hundred billion, six hundred sixty-one million, eight hundred seventeen thousand, six hundred forty".