65143721860 has 96 divisors (see below), whose sum is σ = 164641639680. Its totient is φ = 21150720000.

The previous prime is 65143721801. The next prime is 65143721893. The reversal of 65143721860 is 6812734156.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 10639600 + ... + 10645720.

It is an arithmetic number, because the mean of its divisors is an integer number (1715017080).

Almost surely, 2^65143721860 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 65143721860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82320819840).

65143721860 is an abundant number, since it is smaller than the sum of its proper divisors (99497917820).

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

65143721860 is a wasteful number, since it uses less digits than its factorization.

65143721860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10157 (or 10155 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 65143721860 in words is "sixty-five billion, one hundred forty-three million, seven hundred twenty-one thousand, eight hundred sixty".