65481536951280 has 120 divisors (see below), whose sum is σ = 221257962573648. Its totient is φ = 17354615897088.

The previous prime is 65481536951221. The next prime is 65481536951297. The reversal of 65481536951280 is 8215963518456.

65481536951280 is a `hidden beast` number, since 6 + 5 + 4 + 8 + 1 + 5 + 36 + 9 + 512 + 80 = 666.

It is a tau number, because it is divible by the number of its divisors (120).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 278859877 + ... + 279094596.

Almost surely, 2^{65481536951280} is an apocalyptic number.

65481536951280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65481536951280 is an abundant number, since it is smaller than the sum of its proper divisors (155776425622368).

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

65481536951280 is a wasteful number, since it uses less digits than its factorization.

65481536951280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 557954655 (or 557954646 counting only the distinct ones).

The product of its (nonzero) digits is 62208000, while the sum is 63.

The spelling of 65481536951280 in words is "sixty-five trillion, four hundred eighty-one billion, five hundred thirty-six million, nine hundred fifty-one thousand, two hundred eighty".