655201556671 has 4 divisors (see below), whose sum is σ = 655802109144. Its totient is φ = 654601004200.

The previous prime is 655201556651. The next prime is 655201556717. The reversal of 655201556671 is 176655102556.

It is a happy number.

655201556671 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 655201556671 - 2¹³ = 655201548479 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (655201556621) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 300274600 + ... + 300276781.

It is an arithmetic number, because the mean of its divisors is an integer number (163950527286).

Almost surely, 2^655201556671 is an apocalyptic number.

655201556671 is a deficient number, since it is larger than the sum of its proper divisors (600552473).

655201556671 is a wasteful number, since it uses less digits than its factorization.

655201556671 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 600552472.

The product of its (nonzero) digits is 1890000, while the sum is 49.

The spelling of 655201556671 in words is "six hundred fifty-five billion, two hundred one million, five hundred fifty-six thousand, six hundred seventy-one".