655485891 has 8 divisors (see below), whose sum is σ = 874171584. Its totient is φ = 436895400.

The previous prime is 655485871. The next prime is 655485893. The reversal of 655485891 is 198584556.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 655485891 - 2⁶ = 655485827 is a prime.

It is not an unprimeable number, because it can be changed into a prime (655485893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5785 + ... + 36666.

It is an arithmetic number, because the mean of its divisors is an integer number (109271448).

Almost surely, 2^655485891 is an apocalyptic number.

655485891 is a deficient number, since it is larger than the sum of its proper divisors (218685693).

655485891 is a wasteful number, since it uses less digits than its factorization.

655485891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47601.

The product of its digits is 1728000, while the sum is 51.

The square root of 655485891 is about 25602.4586905242. The cubic root of 655485891 is about 868.6692523608.

The spelling of 655485891 in words is "six hundred fifty-five million, four hundred eighty-five thousand, eight hundred ninety-one".