65197725144 has 64 divisors (see below), whose sum is σ = 168643399680. Its totient is φ = 20982624000.

The previous prime is 65197725137. The next prime is 65197725167. The reversal of 65197725144 is 44152779156.

It is a congruent number.

It is an unprimeable number.

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, 219004 + ... + 422324.

It is an arithmetic number, because the mean of its divisors is an integer number (2635053120).

Almost surely, 2^65197725144 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 65197725144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84321699840).

65197725144 is an abundant number, since it is smaller than the sum of its proper divisors (103445674536).

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

65197725144 is a wasteful number, since it uses less digits than its factorization.

65197725144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 203792 (or 203788 counting only the distinct ones).

The product of its digits is 2116800, while the sum is 51.

The spelling of 65197725144 in words is "sixty-five billion, one hundred ninety-seven million, seven hundred twenty-five thousand, one hundred forty-four".