655815251728 has 80 divisors (see below), whose sum is σ = 1564121862016. Its totient is φ = 259401139200.

The previous prime is 655815251723. The next prime is 655815251737. The reversal of 655815251728 is 827152518556.

It is not an unprimeable number, because it can be changed into a prime (655815251723) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9813628 + ... + 9880228.

Almost surely, 2^655815251728 is an apocalyptic number.

It is an amenable number.

655815251728 is an abundant number, since it is smaller than the sum of its proper divisors (908306610288).

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

655815251728 is a wasteful number, since it uses less digits than its factorization.

655815251728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73392 (or 73386 counting only the distinct ones).

The product of its digits is 6720000, while the sum is 55.

The spelling of 655815251728 in words is "six hundred fifty-five billion, eight hundred fifteen million, two hundred fifty-one thousand, seven hundred twenty-eight".