65143541620 has 48 divisors (see below), whose sum is σ = 140537088720. Its totient is φ = 25346248704.

The previous prime is 65143541611. The next prime is 65143541621. The reversal of 65143541620 is 2614534156.

It can be written as a sum of positive squares in 8 ways, for example, as 16724179684 + 48419361936 = 129322^2 + 220044^2 .

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a self number, because there is not a number n which added to its sum of digits gives 65143541620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65143541621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3332836 + ... + 3352324.

It is an arithmetic number, because the mean of its divisors is an integer number (2927856015).

Almost surely, 2^65143541620 is an apocalyptic number.

It is an amenable number.

65143541620 is an abundant number, since it is smaller than the sum of its proper divisors (75393547100).

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

65143541620 is a wasteful number, since it uses less digits than its factorization.

65143541620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24052 (or 24050 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 37.

The spelling of 65143541620 in words is "sixty-five billion, one hundred forty-three million, five hundred forty-one thousand, six hundred twenty".