65780284464 has 80 divisors (see below), whose sum is σ = 197023104000. Its totient is φ = 20973420864.

The previous prime is 65780284457. The next prime is 65780284469. The reversal of 65780284464 is 46448208756.

It is a happy number.

65780284464 is a `hidden beast` number, since 6 + 578 + 0 + 2 + 8 + 4 + 4 + 64 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a self number, because there is not a number n which added to its sum of digits gives 65780284464.

It is not an unprimeable number, because it can be changed into a prime (65780284469) by changing a digit.

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, 3300264 + ... + 3320135.

It is an arithmetic number, because the mean of its divisors is an integer number (2462788800).

Almost surely, 2^65780284464 is an apocalyptic number.

It is an amenable number.

65780284464 is an abundant number, since it is smaller than the sum of its proper divisors (131242819536).

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

65780284464 is a wasteful number, since it uses less digits than its factorization.

65780284464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6620439 (or 6620427 counting only the distinct ones).

The product of its (nonzero) digits is 10321920, while the sum is 54.

The spelling of 65780284464 in words is "sixty-five billion, seven hundred eighty million, two hundred eighty-four thousand, four hundred sixty-four".