655054725191 has 4 divisors (see below), whose sum is σ = 655141026384. Its totient is φ = 654968424000.

The previous prime is 655054725187. The next prime is 655054725211. The reversal of 655054725191 is 191527450556.

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 655054725191 - 2² = 655054725187 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 (655054722191) 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, 43139210 + ... + 43154391.

It is an arithmetic number, because the mean of its divisors is an integer number (163785256596).

Almost surely, 2^655054725191 is an apocalyptic number.

655054725191 is a deficient number, since it is larger than the sum of its proper divisors (86301193).

655054725191 is an equidigital number, since it uses as much as digits as its factorization.

655054725191 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86301192.

The product of its (nonzero) digits is 1890000, while the sum is 50.

The spelling of 655054725191 in words is "six hundred fifty-five billion, fifty-four million, seven hundred twenty-five thousand, one hundred ninety-one".