260721619872 has 96 divisors (see below), whose sum is σ = 782248932864. Its totient is φ = 74483884800.

The previous prime is 260721619813. The next prime is 260721619883. The reversal of 260721619872 is 278916127062.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 9401547 + ... + 9429237.

It is an arithmetic number, because the mean of its divisors is an integer number (8148426384).

Almost surely, 2^260721619872 is an apocalyptic number.

It is an amenable number.

260721619872 is an abundant number, since it is smaller than the sum of its proper divisors (521527312992).

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

260721619872 is a wasteful number, since it uses less digits than its factorization.

260721619872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41722 (or 41714 counting only the distinct ones).

The product of its (nonzero) digits is 1016064, while the sum is 51.

The spelling of 260721619872 in words is "two hundred sixty billion, seven hundred twenty-one million, six hundred nineteen thousand, eight hundred seventy-two".