655200007128 has 48 divisors (see below), whose sum is σ = 1800985107480. Its totient is φ = 215140299264.

The previous prime is 655200007123. The next prime is 655200007199. The reversal of 655200007128 is 821700002556.

It is a happy number.

655200007128 is a `hidden beast` number, since 6 + 5 + 520 + 0 + 0 + 0 + 7 + 128 = 666.

It is a super-3 number, since 3×655200007128³ (a number of 36 digits) contains 333 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

655200007128 is a modest number, since divided by 7128 gives 6552 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 655200007092 and 655200007101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655200007123) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67905625 + ... + 67915272.

Almost surely, 2^655200007128 is an apocalyptic number.

It is an amenable number.

655200007128 is an abundant number, since it is smaller than the sum of its proper divisors (1145785100352).

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

655200007128 is a wasteful number, since it uses less digits than its factorization.

655200007128 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135820976 (or 135820969 counting only the distinct ones).

The product of its (nonzero) digits is 33600, while the sum is 36.

The spelling of 655200007128 in words is "six hundred fifty-five billion, two hundred million, seven thousand, one hundred twenty-eight".