65199740928 has 384 divisors, whose sum is σ = 212169484800. Its totient is φ = 17390370816.

The previous prime is 65199740899. The next prime is 65199740987. The reversal of 65199740928 is 82904799156.

It is a tau number, because it is divible by the number of its divisors (384).

It is a congruent number.

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, 59651550 + ... + 59652642.

It is an arithmetic number, because the mean of its divisors is an integer number (552524700).

Almost surely, 2^65199740928 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 65199740928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (106084742400).

65199740928 is an abundant number, since it is smaller than the sum of its proper divisors (146969743872).

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

65199740928 is a wasteful number, since it uses less digits than its factorization.

65199740928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217 (or 1197 counting only the distinct ones).

The product of its (nonzero) digits is 9797760, while the sum is 60.

The spelling of 65199740928 in words is "sixty-five billion, one hundred ninety-nine million, seven hundred forty thousand, nine hundred twenty-eight".