65397705120 has 1152 divisors, whose sum is σ = 271724544000. Its totient is φ = 14143610880.

The previous prime is 65397705103. The next prime is 65397705143. The reversal of 65397705120 is 2150779356.

65397705120 is a `hidden beast` number, since 65 + 3 + 9 + 7 + 70 + 512 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 514942497 + ... + 514942623.

It is an arithmetic number, because the mean of its divisors is an integer number (235872000).

Almost surely, 2^65397705120 is an apocalyptic number.

65397705120 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 65397705120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (135862272000).

65397705120 is an abundant number, since it is smaller than the sum of its proper divisors (206326838880).

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

65397705120 is a wasteful number, since it uses less digits than its factorization.

65397705120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266 (or 255 counting only the distinct ones).

The product of its (nonzero) digits is 396900, while the sum is 45.

The spelling of 65397705120 in words is "sixty-five billion, three hundred ninety-seven million, seven hundred five thousand, one hundred twenty".