65415977160 has 128 divisors (see below), whose sum is σ = 208644698880. Its totient is φ = 16370951168.

The previous prime is 65415977129. The next prime is 65415977167. The reversal of 65415977160 is 6177951456.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (65415977167) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 77319 + ... + 369878.

It is an arithmetic number, because the mean of its divisors is an integer number (1630036710).

Almost surely, 2^65415977160 is an apocalyptic number.

65415977160 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 65415977160, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (104322349440).

65415977160 is an abundant number, since it is smaller than the sum of its proper divisors (143228721720).

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

65415977160 is a wasteful number, since it uses less digits than its factorization.

65415977160 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447287 (or 447283 counting only the distinct ones).

The product of its (nonzero) digits is 1587600, while the sum is 51.

The spelling of 65415977160 in words is "sixty-five billion, four hundred fifteen million, nine hundred seventy-seven thousand, one hundred sixty".