655406447211 has 24 divisors (see below), whose sum is σ = 996738075840. Its totient is φ = 413852166000.

The previous prime is 655406447183. The next prime is 655406447221. The reversal of 655406447211 is 112744604556.

655406447211 is a `hidden beast` number, since 6 + 5 + 540 + 64 + 47 + 2 + 1 + 1 = 666.

It is not a de Polignac number, because 655406447211 - 2³¹ = 653258963563 is a prime.

It is a super-2 number, since 2×655406447211² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (655406447221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 393636 + ... + 1210686.

It is an arithmetic number, because the mean of its divisors is an integer number (41530753160).

Almost surely, 2^655406447211 is an apocalyptic number.

655406447211 is a deficient number, since it is larger than the sum of its proper divisors (341331628629).

655406447211 is a wasteful number, since it uses less digits than its factorization.

655406447211 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 821767 (or 821764 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The spelling of 655406447211 in words is "six hundred fifty-five billion, four hundred six million, four hundred forty-seven thousand, two hundred eleven".