65481233280 has 128 divisors (see below), whose sum is σ = 211837092480. Its totient is φ = 17201006592.

The previous prime is 65481233239. The next prime is 65481233299. The reversal of 65481233280 is 8233218456.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

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, 125874 + ... + 383153.

It is an arithmetic number, because the mean of its divisors is an integer number (1654977285).

Almost surely, 2^65481233280 is an apocalyptic number.

65481233280 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

65481233280 is an abundant number, since it is smaller than the sum of its proper divisors (146355859200).

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

65481233280 is a wasteful number, since it uses less digits than its factorization.

65481233280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 509116 (or 509104 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 42.

The spelling of 65481233280 in words is "sixty-five billion, four hundred eighty-one million, two hundred thirty-three thousand, two hundred eighty".