65349361920 has 144 divisors (see below), whose sum is σ = 208877602752. Its totient is φ = 17412464640.

The previous prime is 65349361873. The next prime is 65349361933. The reversal of 65349361920 is 2916394356.

It is a super-2 number, since 2×65349361920² (a number of 22 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 65349361920.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5296879 + ... + 5309201.

It is an arithmetic number, because the mean of its divisors is an integer number (1450538908).

Almost surely, 2^65349361920 is an apocalyptic number.

65349361920 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 65349361920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104438801376).

65349361920 is an abundant number, since it is smaller than the sum of its proper divisors (143528240832).

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

65349361920 is a wasteful number, since it uses less digits than its factorization.

65349361920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13728 (or 13714 counting only the distinct ones).

The product of its (nonzero) digits is 1049760, while the sum is 48.

The spelling of 65349361920 in words is "sixty-five billion, three hundred forty-nine million, three hundred sixty-one thousand, nine hundred twenty".